diff --git a/.dockerignore b/.dockerignore
index ed017abb..fbfcd6ee 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,4 +1,4 @@
-**/node_modules/**/*
+**/node_modules
 lib
 .npmrc
 .nyc_output
diff --git a/.gitignore b/.gitignore
index cea4b537..e99746ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-node_modules
+**/node_modules/**
 yarn.lock
 lib
 .vscode
diff --git a/Dockerfile b/Dockerfile
index 7e489182..b8df4c6f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,13 +3,14 @@ FROM node:12.18.4-alpine as base
 RUN apk add --no-cache bash
 RUN apk add --no-cache curl
 RUN apk add --no-cache git
+ENV JQ_VERSION='1.6'
+RUN apk add --no-cache jq
 
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
 ENV HUSKY_SKIP_INSTALL=true
 COPY package.json package-lock.json ./
-
 RUN npm ci
 COPY . .
 
@@ -17,11 +18,18 @@ FROM base as install
 FROM base as compile
 RUN npm run compile
 
+FROM compile as black-box
+RUN npm ci --prefix ./black-box-tests/shared
+
+#== acceptance tests setup ==#
+FROM black-box as acceptance-tests
+
 #== pre-release tests setup ==#
-FROM compile as pre-release-tests
+FROM black-box as pre-release-tests
 RUN mv $(npm pack | tail -n 1) ./black-box-tests/pre-release/ncdc.tgz
 
 WORKDIR /usr/src/app/black-box-tests/pre-release
+RUN rm -rf ../../node_modules
 RUN npm ci
 RUN npm install ./ncdc.tgz
-RUN npm run build
+RUN npm run typecheck
diff --git a/README.md b/README.md
index 7c2d05e7..8c45532c 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,11 @@ purposes.
 You can find more information about generating schemas and why you might want to
 do that [here](#generate)
 
+## Typescript Compatability
+
+- Typescript 3 - Everything below ncdc version 1.0.0
+- Typescript 4 - Everything above ncdc version 1.0.0
+
 ## CLI usage
 
 ```
diff --git a/black-box-tests/acceptance/jest-extensions.ts b/black-box-tests/acceptance/jest-extensions.ts
index f7388fa2..a1c9abda 100644
--- a/black-box-tests/acceptance/jest-extensions.ts
+++ b/black-box-tests/acceptance/jest-extensions.ts
@@ -1,9 +1,11 @@
 import strip from 'strip-ansi'
 import { toMatchSnapshot } from 'jest-snapshot'
 
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 declare global {
   // eslint-disable-next-line @typescript-eslint/no-namespace
   namespace jest {
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     interface Matchers<R> {
       toMatchStrippedSnapshot(): R
     }
@@ -20,7 +22,7 @@ expect.extend({
       })
       .join('\n')
 
-    // eslint-disable-next-line @typescript-eslint/ban-ts-ignore
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
     // @ts-ignore do not know how to fix this "this" type mismatch
     return toMatchSnapshot.call(this, content, 'toMatchStrippedSnapshot')
   },
diff --git a/black-box-tests/acceptance/serve.spec.ts b/black-box-tests/acceptance/serve.spec.ts
index cd2a50b1..15f59f83 100644
--- a/black-box-tests/acceptance/serve.spec.ts
+++ b/black-box-tests/acceptance/serve.spec.ts
@@ -115,7 +115,7 @@ describe('ncdc serve', () => {
     })
 
     it('logs a message and kills the server when the config file has problems', async () => {
-      // eslint-disable-next-line @typescript-eslint/ban-ts-ignore
+      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
       // @ts-ignore
       configWrapper.editConfig('Books', (c) => ({ ...c, request: {} }))
 
diff --git a/black-box-tests/acceptance/tsconfig.json b/black-box-tests/acceptance/tsconfig.json
index 91ef8bce..2f135c62 100644
--- a/black-box-tests/acceptance/tsconfig.json
+++ b/black-box-tests/acceptance/tsconfig.json
@@ -3,12 +3,17 @@
   "compilerOptions": {
     "baseUrl": "../../",
     "rootDir": "./",
-    "noEmit": true,
-    "composite": false,
+    "typeRoots": ["../../node_modules/@types"],
+    "noEmit": false,
+    "emitDeclarationOnly": true,
+    "outDir": "../out/acceptance",
+    "composite": true,
     "paths": {
-      "~shared/*": ["./black-box-tests/shared/*"]
+      "~shared/*": ["./black-box-tests/shared/*"],
+      "~*": ["src/*"]
     }
   },
-  "references": [{ "path": "../shared" }],
-  "include": ["**/*.ts"]
+  "references": [{ "path": "../shared/tsconfig.json" }],
+  "include": ["**/*.ts"],
+  "files": ["../../src/index.d.ts"]
 }
diff --git a/black-box-tests/pre-release/package-lock.json b/black-box-tests/pre-release/package-lock.json
index 2a6bc2fa..1d378ff0 100644
--- a/black-box-tests/pre-release/package-lock.json
+++ b/black-box-tests/pre-release/package-lock.json
@@ -978,54 +978,12 @@
         "@babel/types": "^7.3.0"
       }
     },
-    "@types/body-parser": {
-      "version": "1.19.0",
-      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.0.tgz",
-      "integrity": "sha512-W98JrE0j2K78swW4ukqMleo8R7h/pFETjM2DQ90MF6XK2i4LO4W3gQ71Lt4w3bfm2EvVSyWHplECvB5sK22yFQ==",
-      "dev": true,
-      "requires": {
-        "@types/connect": "*",
-        "@types/node": "*"
-      }
-    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
       "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
       "dev": true
     },
-    "@types/connect": {
-      "version": "3.4.33",
-      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.33.tgz",
-      "integrity": "sha512-2+FrkXY4zllzTNfJth7jOqEHC+enpLeGslEhpnTAkg21GkRrWV4SsAtqchtT4YS9/nODBU2/ZfsBY2X4J/dX7A==",
-      "dev": true,
-      "requires": {
-        "@types/node": "*"
-      }
-    },
-    "@types/express": {
-      "version": "4.17.8",
-      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.8.tgz",
-      "integrity": "sha512-wLhcKh3PMlyA2cNAB9sjM1BntnhPMiM0JOBwPBqttjHev2428MLEB4AYVN+d8s2iyCVZac+o41Pflm/ZH5vLXQ==",
-      "dev": true,
-      "requires": {
-        "@types/body-parser": "*",
-        "@types/express-serve-static-core": "*",
-        "@types/qs": "*",
-        "@types/serve-static": "*"
-      }
-    },
-    "@types/express-serve-static-core": {
-      "version": "4.17.12",
-      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.17.12.tgz",
-      "integrity": "sha512-EaEdY+Dty1jEU7U6J4CUWwxL+hyEGMkO5jan5gplfegUgCUsIUWqXxqw47uGjimeT4Qgkz/XUfwoau08+fgvKA==",
-      "dev": true,
-      "requires": {
-        "@types/node": "*",
-        "@types/qs": "*",
-        "@types/range-parser": "*"
-      }
-    },
     "@types/graceful-fs": {
       "version": "4.1.3",
       "resolved": "https://registry.npmjs.org/@types/graceful-fs/-/graceful-fs-4.1.3.tgz",
@@ -1130,53 +1088,12 @@
         }
       }
     },
-    "@types/js-yaml": {
-      "version": "3.12.5",
-      "resolved": "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-3.12.5.tgz",
-      "integrity": "sha512-JCcp6J0GV66Y4ZMDAQCXot4xprYB+Zfd3meK9+INSJeVZwJmHAW30BBEEkPzXswMXuiyReUGOP3GxrADc9wPww==",
-      "dev": true
-    },
-    "@types/json-schema": {
-      "version": "7.0.6",
-      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.6.tgz",
-      "integrity": "sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw==",
-      "dev": true
-    },
-    "@types/mime": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/@types/mime/-/mime-2.0.3.tgz",
-      "integrity": "sha512-Jus9s4CDbqwocc5pOAnh8ShfrnMcPHuJYzVcSUU7lrh8Ni5HuIqX3oilL86p3dlTrk0LzHRCgA/GQ7uNCw6l2Q==",
-      "dev": true
-    },
     "@types/node": {
       "version": "14.0.23",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-14.0.23.tgz",
       "integrity": "sha512-Z4U8yDAl5TFkmYsZdFPdjeMa57NOvnaf1tljHzhouaPEp7LCj2JKkejpI1ODviIAQuW4CcQmxkQ77rnLsOOoKw==",
       "dev": true
     },
-    "@types/node-fetch": {
-      "version": "2.5.7",
-      "resolved": "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.5.7.tgz",
-      "integrity": "sha512-o2WVNf5UhWRkxlf6eq+jMZDu7kjgpgJfl4xVNlvryc95O/6F2ld8ztKX+qu+Rjyet93WAWm5LjeX9H5FGkODvw==",
-      "dev": true,
-      "requires": {
-        "@types/node": "*",
-        "form-data": "^3.0.0"
-      },
-      "dependencies": {
-        "form-data": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/form-data/-/form-data-3.0.0.tgz",
-          "integrity": "sha512-CKMFDglpbMi6PyN+brwB9Q/GOw0eAnsrEZDgcsH5Krhz5Od/haKHAX0NmQfha2zPPz0JpWzA7GJHGSnvCRLWsg==",
-          "dev": true,
-          "requires": {
-            "asynckit": "^0.4.0",
-            "combined-stream": "^1.0.8",
-            "mime-types": "^2.1.12"
-          }
-        }
-      }
-    },
     "@types/normalize-package-data": {
       "version": "2.4.0",
       "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.0.tgz",
@@ -1189,34 +1106,21 @@
       "integrity": "sha512-hiYA88aHiEIgDmeKlsyVsuQdcFn3Z2VuFd/Xm/HCnGnPD8UFU5BM128uzzRVVGEzKDKYUrRsRH9S2o+NUy/3IA==",
       "dev": true
     },
-    "@types/qs": {
-      "version": "6.9.4",
-      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.4.tgz",
-      "integrity": "sha512-+wYo+L6ZF6BMoEjtf8zB2esQsqdV6WsjRK/GP9WOgLPrq87PbNWgIxS76dS5uvl/QXtHGakZmwTznIfcPXcKlQ==",
-      "dev": true
-    },
-    "@types/range-parser": {
-      "version": "1.2.3",
-      "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.3.tgz",
-      "integrity": "sha512-ewFXqrQHlFsgc09MK5jP5iR7vumV/BYayNC6PgJO2LPe8vrnNFyjQjSppfEngITi0qvfKtzFvgKymGheFM9UOA==",
-      "dev": true
-    },
-    "@types/serve-static": {
-      "version": "1.13.5",
-      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.13.5.tgz",
-      "integrity": "sha512-6M64P58N+OXjU432WoLLBQxbA0LRGBCRm7aAGQJ+SMC1IMl0dgRVi9EFfoDcS2a7Xogygk/eGN94CfwU9UF7UQ==",
-      "dev": true,
-      "requires": {
-        "@types/express-serve-static-core": "*",
-        "@types/mime": "*"
-      }
-    },
     "@types/stack-utils": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/@types/stack-utils/-/stack-utils-1.0.1.tgz",
       "integrity": "sha512-l42BggppR6zLmpfU6fq9HEa2oGPEI8yrSPL3GITjfRInppYFahObbIQOQK3UGxEnyQpltZLaPe75046NOZQikw==",
       "dev": true
     },
+    "@types/strip-ansi": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/@types/strip-ansi/-/strip-ansi-5.2.1.tgz",
+      "integrity": "sha512-1l5iM0LBkVU8JXxnIoBqNvg+yyOXxPeN6DNoD+7A9AN1B8FhYPSeIXgyNqwIqg1uzipTgVC2hmuDzB0u9qw/PA==",
+      "dev": true,
+      "requires": {
+        "strip-ansi": "*"
+      }
+    },
     "@types/yargs": {
       "version": "15.0.5",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-15.0.5.tgz",
@@ -1238,16 +1142,6 @@
       "integrity": "sha512-9IK9EadsbHo6jLWIpxpR6pL0sazTXV6+SQv25ZB+F7Bj9mJNaOc4nCRabwd5M/JwmUa8idz6Eci6eKfJryPs6Q==",
       "dev": true
     },
-    "accepts": {
-      "version": "1.3.7",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
-      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
-      "dev": true,
-      "requires": {
-        "mime-types": "~2.1.24",
-        "negotiator": "0.6.2"
-      }
-    },
     "acorn": {
       "version": "7.4.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.0.tgz",
@@ -1352,12 +1246,6 @@
       "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
       "dev": true
     },
-    "array-flatten": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
-      "dev": true
-    },
     "array-unique": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
@@ -1573,24 +1461,6 @@
         "tweetnacl": "^0.14.3"
       }
     },
-    "body-parser": {
-      "version": "1.19.0",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
-      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
-      "dev": true,
-      "requires": {
-        "bytes": "3.1.0",
-        "content-type": "~1.0.4",
-        "debug": "2.6.9",
-        "depd": "~1.1.2",
-        "http-errors": "1.7.2",
-        "iconv-lite": "0.4.24",
-        "on-finished": "~2.3.0",
-        "qs": "6.7.0",
-        "raw-body": "2.4.0",
-        "type-is": "~1.6.17"
-      }
-    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -1640,12 +1510,6 @@
       "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
       "dev": true
     },
-    "bytes": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
-      "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==",
-      "dev": true
-    },
     "cache-base": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
@@ -1804,21 +1668,6 @@
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
       "dev": true
     },
-    "content-disposition": {
-      "version": "0.5.3",
-      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
-      "integrity": "sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "5.1.2"
-      }
-    },
-    "content-type": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
-      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
-      "dev": true
-    },
     "convert-source-map": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
@@ -1828,18 +1677,6 @@
         "safe-buffer": "~5.1.1"
       }
     },
-    "cookie": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
-      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==",
-      "dev": true
-    },
-    "cookie-signature": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
-      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
-      "dev": true
-    },
     "copy-descriptor": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
@@ -1994,18 +1831,6 @@
       "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
       "dev": true
     },
-    "depd": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
-      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=",
-      "dev": true
-    },
-    "destroy": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
-      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=",
-      "dev": true
-    },
     "detect-newline": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/detect-newline/-/detect-newline-3.1.0.tgz",
@@ -2045,12 +1870,6 @@
         "safer-buffer": "^2.1.0"
       }
     },
-    "ee-first": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
-      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=",
-      "dev": true
-    },
     "emittery": {
       "version": "0.7.1",
       "resolved": "https://registry.npmjs.org/emittery/-/emittery-0.7.1.tgz",
@@ -2063,12 +1882,6 @@
       "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
       "dev": true
     },
-    "encodeurl": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
-      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=",
-      "dev": true
-    },
     "end-of-stream": {
       "version": "1.4.4",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.4.tgz",
@@ -2087,12 +1900,6 @@
         "is-arrayish": "^0.2.1"
       }
     },
-    "escape-html": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
-      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=",
-      "dev": true
-    },
     "escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
@@ -2130,12 +1937,6 @@
       "integrity": "sha512-kVscqXk4OCp68SZ0dkgEKVi6/8ij300KBWTJq32P/dYeWTSwK41WyTxalN1eRmA5Z9UU/LX9D7FWSmV9SAYx6g==",
       "dev": true
     },
-    "etag": {
-      "version": "1.8.1",
-      "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
-      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=",
-      "dev": true
-    },
     "exec-sh": {
       "version": "0.3.4",
       "resolved": "https://registry.npmjs.org/exec-sh/-/exec-sh-0.3.4.tgz",
@@ -2236,44 +2037,6 @@
         }
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@@ -5315,12 +4900,6 @@
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@@ -5611,12 +5190,6 @@
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@@ -5776,12 +5349,6 @@
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@@ -5871,16 +5438,6 @@
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@@ -5890,6 +5447,11 @@
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       }
     },
+    "typescript": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz",
+      "integrity": "sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ=="
+    },
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       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
@@ -5902,12 +5464,6 @@
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@@ -5969,12 +5525,6 @@
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@@ -6011,12 +5561,6 @@
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diff --git a/black-box-tests/pre-release/package.json b/black-box-tests/pre-release/package.json
index 2e96c7c4..b2daf009 100644
--- a/black-box-tests/pre-release/package.json
+++ b/black-box-tests/pre-release/package.json
@@ -4,24 +4,22 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "test": "jest",
-    "build": "tsc -b ../shared ."
+    "test": "NCDC_ENTRYPOINT=./node_modules/.bin/ncdc jest",
+    "typecheck": "tsc -b ./tsconfig.json",
+    "install:ncdc": "cd ../../ && mv $(npm pack --prefix ../../ | tail -n 1) ./black-box-tests/pre-release/ncdc.tgz && cd - && npm install ./ncdc.tgz"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
   "devDependencies": {
-    "@types/express": "^4.17.8",
     "@types/jest": "^26.0.14",
-    "@types/js-yaml": "^3.12.5",
-    "@types/json-schema": "^7.0.6",
     "@types/node": "^14.0.23",
-    "@types/node-fetch": "^2.5.7",
-    "express": "^4.17.1",
+    "@types/strip-ansi": "^5.2.1",
     "jest": "^26.4.2",
-    "js-yaml": "^3.14.0",
-    "node-fetch": "^2.6.1",
     "strip-ansi": "^6.0.0",
     "ts-jest": "^26.4.0"
+  },
+  "dependencies": {
+    "typescript": "^4.0.2"
   }
 }
diff --git a/black-box-tests/pre-release/smoke-tests.spec.ts b/black-box-tests/pre-release/smoke-tests.spec.ts
index 459db276..c08fd4f2 100644
--- a/black-box-tests/pre-release/smoke-tests.spec.ts
+++ b/black-box-tests/pre-release/smoke-tests.spec.ts
@@ -39,7 +39,7 @@ describe('Test command', () => {
   })
 
   it('works', async () => {
-    realServer = new RealServerBuilder().withGetEndpoint('/api/resource', 200, 'eat my shorts!').start()
+    realServer = new RealServerBuilder().withGetEndpoint('/api/resource', 200, { eat: 'my shorts' }).start()
 
     new ConfigWrapper()
       .addTsconfig()
@@ -47,14 +47,17 @@ describe('Test command', () => {
         new ConfigBuilder()
           .withName('Shorts')
           .withEndpoints('/api/resource')
-          .withResponseHeaders({ 'content-type': 'text/plain' })
+          .withResponseHeaders({ 'content-type': 'application/json' })
+          .withResponseType('Book')
+          .withResponseBody({ eat: 'my shorts' })
           .build(),
       )
+      .addType('Book', { eat: 'string' })
 
     const result = await runTestCommand()
 
-    expect(result.success).toBeTruthy()
     expect(result.output).toContain(`info: PASSED: Shorts - ${REAL_SERVER_HOST}/api/resource`)
+    expect(result.success).toBeTruthy()
   })
 })
 
@@ -69,7 +72,15 @@ describe('Serve command', () => {
   })
 
   it('works', async () => {
-    new ConfigWrapper().addTsconfig().addConfig()
+    new ConfigWrapper()
+      .addTsconfig()
+      .addConfig(new ConfigBuilder().withResponseType('Book').build())
+      .addType('Book', {
+        ISBN: 'string',
+        ISBN_13: 'string',
+        author: 'string',
+        title: 'string',
+      })
 
     const { waitForOutput } = await prepareServe(cleanupTasks)()
     await waitForOutput(`Endpoints are being served`)
diff --git a/black-box-tests/shared/config-wrapper.ts b/black-box-tests/shared/config-wrapper.ts
index 7fed6feb..1ff7f2ae 100644
--- a/black-box-tests/shared/config-wrapper.ts
+++ b/black-box-tests/shared/config-wrapper.ts
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/ban-types */
 import { Config, ConfigBuilder } from './config-builder'
 import { existsSync, rmdirSync, mkdirSync, writeFileSync, unlinkSync } from 'fs'
 import jsyaml from 'js-yaml'
diff --git a/black-box-tests/shared/package-lock.json b/black-box-tests/shared/package-lock.json
new file mode 100644
index 00000000..724c425a
--- /dev/null
+++ b/black-box-tests/shared/package-lock.json
@@ -0,0 +1,969 @@
+{
+  "name": "shared",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@jest/types": {
+      "version": "25.5.0",
+      "resolved": "https://registry.npmjs.org/@jest/types/-/types-25.5.0.tgz",
+      "integrity": "sha512-OXD0RgQ86Tu3MazKo8bnrkDRaDXXMGUqd+kTtLtK1Zb7CRzQcaSRPPPV37SvYTdevXEBVxe0HXylEjs8ibkmCw==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "^2.0.0",
+        "@types/istanbul-reports": "^1.1.1",
+        "@types/yargs": "^15.0.0",
+        "chalk": "^3.0.0"
+      }
+    },
+    "@types/body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-W98JrE0j2K78swW4ukqMleo8R7h/pFETjM2DQ90MF6XK2i4LO4W3gQ71Lt4w3bfm2EvVSyWHplECvB5sK22yFQ==",
+      "dev": true,
+      "requires": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/color-name": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
+      "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
+      "dev": true
+    },
+    "@types/connect": {
+      "version": "3.4.33",
+      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.33.tgz",
+      "integrity": "sha512-2+FrkXY4zllzTNfJth7jOqEHC+enpLeGslEhpnTAkg21GkRrWV4SsAtqchtT4YS9/nODBU2/ZfsBY2X4J/dX7A==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/express": {
+      "version": "4.17.8",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.8.tgz",
+      "integrity": "sha512-wLhcKh3PMlyA2cNAB9sjM1BntnhPMiM0JOBwPBqttjHev2428MLEB4AYVN+d8s2iyCVZac+o41Pflm/ZH5vLXQ==",
+      "dev": true,
+      "requires": {
+        "@types/body-parser": "*",
+        "@types/express-serve-static-core": "*",
+        "@types/qs": "*",
+        "@types/serve-static": "*"
+      }
+    },
+    "@types/express-serve-static-core": {
+      "version": "4.17.13",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.17.13.tgz",
+      "integrity": "sha512-RgDi5a4nuzam073lRGKTUIaL3eF2+H7LJvJ8eUnCI0wA6SNjXc44DCmWNiTLs/AZ7QlsFWZiw/gTG3nSQGL0fA==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*",
+        "@types/qs": "*",
+        "@types/range-parser": "*"
+      }
+    },
+    "@types/istanbul-lib-coverage": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.3.tgz",
+      "integrity": "sha512-sz7iLqvVUg1gIedBOvlkxPlc8/uVzyS5OwGz1cKjXzkl3FpL3al0crU8YGU1WoHkxn0Wxbw5tyi6hvzJKNzFsw==",
+      "dev": true
+    },
+    "@types/istanbul-lib-report": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-report/-/istanbul-lib-report-3.0.0.tgz",
+      "integrity": "sha512-plGgXAPfVKFoYfa9NpYDAkseG+g6Jr294RqeqcqDixSbU34MZVJRi/P+7Y8GDpzkEwLaGZZOpKIEmeVZNtKsrg==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "*"
+      }
+    },
+    "@types/istanbul-reports": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-reports/-/istanbul-reports-1.1.2.tgz",
+      "integrity": "sha512-P/W9yOX/3oPZSpaYOCQzGqgCQRXn0FFO/V8bWrCQs+wLmvVVxk6CRBXALEvNs9OHIatlnlFokfhuDo2ug01ciw==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "*",
+        "@types/istanbul-lib-report": "*"
+      }
+    },
+    "@types/jest": {
+      "version": "26.0.14",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-26.0.14.tgz",
+      "integrity": "sha512-Hz5q8Vu0D288x3iWXePSn53W7hAjP0H7EQ6QvDO9c7t46mR0lNOLlfuwQ+JkVxuhygHzlzPX+0jKdA3ZgSh+Vg==",
+      "dev": true,
+      "requires": {
+        "jest-diff": "^25.2.1",
+        "pretty-format": "^25.2.1"
+      }
+    },
+    "@types/js-yaml": {
+      "version": "3.12.5",
+      "resolved": "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-3.12.5.tgz",
+      "integrity": "sha512-JCcp6J0GV66Y4ZMDAQCXot4xprYB+Zfd3meK9+INSJeVZwJmHAW30BBEEkPzXswMXuiyReUGOP3GxrADc9wPww==",
+      "dev": true
+    },
+    "@types/json-schema": {
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.6.tgz",
+      "integrity": "sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw==",
+      "dev": true
+    },
+    "@types/mime": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@types/mime/-/mime-2.0.3.tgz",
+      "integrity": "sha512-Jus9s4CDbqwocc5pOAnh8ShfrnMcPHuJYzVcSUU7lrh8Ni5HuIqX3oilL86p3dlTrk0LzHRCgA/GQ7uNCw6l2Q==",
+      "dev": true
+    },
+    "@types/node": {
+      "version": "14.6.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.6.0.tgz",
+      "integrity": "sha512-mikldZQitV94akrc4sCcSjtJfsTKt4p+e/s0AGscVA6XArQ9kFclP+ZiYUMnq987rc6QlYxXv/EivqlfSLxpKA==",
+      "dev": true
+    },
+    "@types/node-fetch": {
+      "version": "2.5.7",
+      "resolved": "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.5.7.tgz",
+      "integrity": "sha512-o2WVNf5UhWRkxlf6eq+jMZDu7kjgpgJfl4xVNlvryc95O/6F2ld8ztKX+qu+Rjyet93WAWm5LjeX9H5FGkODvw==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*",
+        "form-data": "^3.0.0"
+      }
+    },
+    "@types/qs": {
+      "version": "6.9.5",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.5.tgz",
+      "integrity": "sha512-/JHkVHtx/REVG0VVToGRGH2+23hsYLHdyG+GrvoUGlGAd0ErauXDyvHtRI/7H7mzLm+tBCKA7pfcpkQ1lf58iQ==",
+      "dev": true
+    },
+    "@types/range-parser": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.3.tgz",
+      "integrity": "sha512-ewFXqrQHlFsgc09MK5jP5iR7vumV/BYayNC6PgJO2LPe8vrnNFyjQjSppfEngITi0qvfKtzFvgKymGheFM9UOA==",
+      "dev": true
+    },
+    "@types/serve-static": {
+      "version": "1.13.5",
+      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.13.5.tgz",
+      "integrity": "sha512-6M64P58N+OXjU432WoLLBQxbA0LRGBCRm7aAGQJ+SMC1IMl0dgRVi9EFfoDcS2a7Xogygk/eGN94CfwU9UF7UQ==",
+      "dev": true,
+      "requires": {
+        "@types/express-serve-static-core": "*",
+        "@types/mime": "*"
+      }
+    },
+    "@types/yargs": {
+      "version": "15.0.7",
+      "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-15.0.7.tgz",
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+      "dev": true,
+      "requires": {
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+      }
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+    "@types/yargs-parser": {
+      "version": "15.0.0",
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+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "dev": true,
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "ansi-regex": {
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+      "requires": {
+        "@types/color-name": "^1.1.1",
+        "color-convert": "^2.0.1"
+      }
+    },
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+      "requires": {
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+    },
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+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
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+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
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+      "requires": {
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+      "dev": true,
+      "requires": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
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+      "dev": true,
+      "requires": {
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+      "requires": {
+        "@jest/types": "^25.5.0",
+        "ansi-regex": "^5.0.0",
+        "ansi-styles": "^4.0.0",
+        "react-is": "^16.12.0"
+      }
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+      "dev": true,
+      "requires": {
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+        "ipaddr.js": "1.9.1"
+      }
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+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
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+      "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
+      "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==",
+      "dev": true
+    },
+    "raw-body": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.4.0.tgz",
+      "integrity": "sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==",
+      "dev": true,
+      "requires": {
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+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "unpipe": "1.0.0"
+      }
+    },
+    "react-is": {
+      "version": "16.13.1",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
+      "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==",
+      "dev": true
+    },
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+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
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+    },
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+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
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+      "dev": true
+    },
+    "semver": {
+      "version": "7.3.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz",
+      "integrity": "sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==",
+      "dev": true
+    },
+    "send": {
+      "version": "0.17.1",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.17.1.tgz",
+      "integrity": "sha512-BsVKsiGcQMFwT8UxypobUKyv7irCNRHk1T0G680vk88yf6LBByGcZJOTJCrTP2xVN6yI+XjPJcNuE3V4fT9sAg==",
+      "dev": true,
+      "requires": {
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "destroy": "~1.0.4",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "fresh": "0.5.2",
+        "http-errors": "~1.7.2",
+        "mime": "1.6.0",
+        "ms": "2.1.1",
+        "on-finished": "~2.3.0",
+        "range-parser": "~1.2.1",
+        "statuses": "~1.5.0"
+      },
+      "dependencies": {
+        "ms": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+          "dev": true
+        }
+      }
+    },
+    "serve-static": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz",
+      "integrity": "sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==",
+      "dev": true,
+      "requires": {
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.3",
+        "send": "0.17.1"
+      }
+    },
+    "setprototypeof": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+      "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==",
+      "dev": true
+    },
+    "sprintf-js": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
+      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "dev": true
+    },
+    "statuses": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
+      "integrity": "sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=",
+      "dev": true
+    },
+    "strip-ansi": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
+      "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+      "dev": true,
+      "requires": {
+        "ansi-regex": "^5.0.0"
+      }
+    },
+    "supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "dev": true,
+      "requires": {
+        "has-flag": "^4.0.0"
+      }
+    },
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "requires": {
+        "is-number": "^7.0.0"
+      }
+    },
+    "toidentifier": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
+      "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==",
+      "dev": true
+    },
+    "ts-jest": {
+      "version": "26.4.0",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-26.4.0.tgz",
+      "integrity": "sha512-ofBzoCqf6Nv/PoWb/ByV3VNKy2KJSikamOBxvR3E6eVdIw10GwAXoyvMWXXjZJK2s6S27ZE8fI+JBTnGaovl6Q==",
+      "dev": true,
+      "requires": {
+        "@types/jest": "26.x",
+        "bs-logger": "0.x",
+        "buffer-from": "1.x",
+        "fast-json-stable-stringify": "2.x",
+        "jest-util": "^26.1.0",
+        "json5": "2.x",
+        "lodash.memoize": "4.x",
+        "make-error": "1.x",
+        "mkdirp": "1.x",
+        "semver": "7.x",
+        "yargs-parser": "20.x"
+      }
+    },
+    "type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "dev": true,
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      }
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=",
+      "dev": true
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=",
+      "dev": true
+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
+      "dev": true
+    },
+    "yargs-parser": {
+      "version": "20.2.0",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.0.tgz",
+      "integrity": "sha512-2agPoRFPoIcFzOIp6656gcvsg2ohtscpw2OINr/q46+Sq41xz2OYLqx5HRHabmFU1OARIPAYH5uteICE7mn/5A==",
+      "dev": true
+    }
+  }
+}
diff --git a/black-box-tests/shared/package.json b/black-box-tests/shared/package.json
new file mode 100644
index 00000000..49f65f27
--- /dev/null
+++ b/black-box-tests/shared/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "shared",
+  "version": "1.0.0",
+  "description": "",
+  "main": ".eslintrc.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/express": "^4.17.8",
+    "@types/jest": "^26.0.14",
+    "@types/js-yaml": "^3.12.5",
+    "@types/json-schema": "^7.0.6",
+    "@types/node": "^14.0.23",
+    "@types/node-fetch": "^2.5.7",
+    "express": "^4.17.1",
+    "js-yaml": "^3.14.0",
+    "node-fetch": "^2.6.1",
+    "strip-ansi": "^6.0.0",
+    "ts-jest": "^26.4.0"
+  }
+}
diff --git a/black-box-tests/shared/tsconfig.json b/black-box-tests/shared/tsconfig.json
index 7f640ea2..28c1e003 100644
--- a/black-box-tests/shared/tsconfig.json
+++ b/black-box-tests/shared/tsconfig.json
@@ -4,8 +4,9 @@
     "lib": ["esnext"],
     "moduleResolution": "node",
     "resolveJsonModule": true,
-    "rootDir": ".",
-    "baseUrl": "../../",
+    "rootDir": "./",
+    "baseUrl": "./",
+    "typeRoots": ["./node_modules/@types"],
     "strict": true,
     "noImplicitAny": true,
     "esModuleInterop": true,
@@ -13,12 +14,9 @@
     "forceConsistentCasingInFileNames": true,
     "strictNullChecks": true,
     "inlineSourceMap": true,
-    "outDir": "../out",
+    "outDir": "../out/shared",
     "noEmit": false,
-    "composite": true,
-    "paths": {
-      "*": ["./pre-release/node_modules/*"]
-    }
+    "composite": true
   },
   "include": ["**/*.ts"]
 }
diff --git a/docker-compose.yml b/docker-compose.yml
index f5046c4c..abcc2f05 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -31,7 +31,7 @@ services:
   acceptance-tests:
     build:
       context: .
-      target: compile
+      target: acceptance-tests
     command: ./node_modules/.bin/nyc --report-dir ./coverage/acceptance-tests yarn test:acceptance --coverage
     volumes:
       - ./coverage/acceptance-tests:/usr/src/app/coverage/acceptance-tests
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 18d63803..84edf55b 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,3 +1,35 @@
+# [1.0.0-alpha.3](https://github.com/tamj0rd2/ncdc/compare/v1.0.0-alpha.2...v1.0.0-alpha.3) (2020-09-11)
+
+
+### chore
+
+* upgrade to typescript 4 ([95ce432](https://github.com/tamj0rd2/ncdc/commit/95ce432db057df739bb978488a46d43e25b26239)), closes [#405](https://github.com/tamj0rd2/ncdc/issues/405)
+
+
+### BREAKING CHANGES
+
+* Upgrade typescript dependency to version 4
+
+# [1.0.0-alpha.2](https://github.com/tamj0rd2/ncdc/compare/v1.0.0-alpha.1...v1.0.0-alpha.2) (2020-08-28)
+
+
+### Bug Fixes
+
+* **serve:** fix project reference related crash ([71f949e](https://github.com/tamj0rd2/ncdc/commit/71f949e95210b9a8da4de0b54f6af52ecb6daab3)), closes [#401](https://github.com/tamj0rd2/ncdc/issues/401)
+
+# [1.0.0-alpha.1](https://github.com/tamj0rd2/ncdc/compare/v0.13.1...v1.0.0-alpha.1) (2020-08-27)
+
+
+### chore
+
+* **deps:** make typescript a peer dependency ([24cc110](https://github.com/tamj0rd2/ncdc/commit/24cc11083a394b849fb4dc451069de4d328992fd))
+
+
+### BREAKING CHANGES
+
+* **deps:** Typescript is no longer a dependency of this project.
+It is a peer dependency and you will need to install it yourself
+
 # [0.14.0](https://github.com/tamj0rd2/ncdc/compare/v0.13.2...v0.14.0) (2020-09-23)
 
 
diff --git a/jest.config.js b/jest.config.js
index d748a4d5..5dc553f4 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -62,9 +62,6 @@ const integrationTestSettings = {
   ],
   coverageDirectory: './coverage/integration-tests',
   coverageReporters: ["lcov", "text", "text-summary"],
-  moduleNameMapper: {
-    '~(.*)$': '<rootDir>/src/$1'
-  },
 }
 
 const acceptanceTestSettings = {
@@ -76,8 +73,15 @@ const acceptanceTestSettings = {
   coverageDirectory: './coverage/acceptance-tests',
   // using nyc to report the coverage instead
   coverageReporters: ["none"],
+  preset: 'ts-jest',
+  globals: {
+    'ts-jest': {
+      tsConfig: './tsconfig.jest.json'
+    }
+  },
   moduleNameMapper: {
-    '~shared(.*)$': '<rootDir>/black-box-tests/shared/$1'
+    '~shared(.*)$': '<rootDir>/black-box-tests/shared/$1',
+    ...lowLevelTestSettings.moduleNameMapper,
   },
 }
 
diff --git a/package-lock.json b/package-lock.json
index c4249c0d..aba3d96f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ncdc",
-  "version": "0.14.0",
+  "version": "1.0.0-alpha.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -3552,6 +3552,56 @@
         "kuler": "^2.0.0"
       }
     },
+    "@eslint/eslintrc": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.1.3.tgz",
+      "integrity": "sha512-4YVwPkANLeNtRjMekzux1ci8hIaH5eGKktGqR0d3LWsKNn5B2X/1Z6Trxy7jQXl9EBGE6Yj02O+t09FMeRllaA==",
+      "dev": true,
+      "requires": {
+        "ajv": "^6.12.4",
+        "debug": "^4.1.1",
+        "espree": "^7.3.0",
+        "globals": "^12.1.0",
+        "ignore": "^4.0.6",
+        "import-fresh": "^3.2.1",
+        "js-yaml": "^3.13.1",
+        "lodash": "^4.17.19",
+        "minimatch": "^3.0.4",
+        "strip-json-comments": "^3.1.1"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "globals": {
+          "version": "12.4.0",
+          "resolved": "https://registry.npmjs.org/globals/-/globals-12.4.0.tgz",
+          "integrity": "sha512-BWICuzzDvDoH54NHKCseDanAhE3CeDorgDL5MT6LMXXj2WCnd9UC2szdk4AWLfjdgNBCXLUanXYcpBBKOSWGwg==",
+          "dev": true,
+          "requires": {
+            "type-fest": "^0.8.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        },
+        "strip-json-comments": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
+          "integrity": "sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==",
+          "dev": true
+        }
+      }
+    },
     "@hapi/address": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/@hapi/address/-/address-4.0.1.tgz",
@@ -4983,12 +5033,6 @@
       "integrity": "sha512-mARrpJofLNe6yhlukeBcznBe8ssZo5ZJ/CJWc3JKmG9L9151s0OHK+mealnkqSgO6cSn1219vND2wgL67Cuqiw==",
       "dev": true
     },
-    "@types/eslint-visitor-keys": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@types/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz",
-      "integrity": "sha512-OCutwjDZ4aFS6PB1UZ988C4YgwlBHJd6wCeQqaLdmadZ/7e+w79+hbMUFC1QXDNCmdyoRfAFdm0RypzwR+Qpag==",
-      "dev": true
-    },
     "@types/express": {
       "version": "4.17.8",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.8.tgz",
@@ -5188,44 +5232,76 @@
       "dev": true
     },
     "@typescript-eslint/eslint-plugin": {
-      "version": "2.34.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.34.0.tgz",
-      "integrity": "sha512-4zY3Z88rEE99+CNvTbXSyovv2z9PNOVffTWD2W8QF5s2prBQtwN2zadqERcrHpcR7O/+KMI3fcTAmUUhK/iQcQ==",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.1.0.tgz",
+      "integrity": "sha512-U+nRJx8XDUqJxYF0FCXbpmD9nWt/xHDDG0zsw1vrVYAmEAuD/r49iowfurjSL2uTA2JsgtpsyG7mjO7PHf2dYw==",
       "dev": true,
       "requires": {
-        "@typescript-eslint/experimental-utils": "2.34.0",
+        "@typescript-eslint/experimental-utils": "4.1.0",
+        "@typescript-eslint/scope-manager": "4.1.0",
+        "debug": "^4.1.1",
         "functional-red-black-tree": "^1.0.1",
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+      "dev": true
     },
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@@ -17971,7 +17870,8 @@
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+      "dev": true
     },
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@@ -18533,7 +18433,8 @@
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-      "integrity": "sha1-BF+XgtARrppoA93TgrJDkrPYkPc="
+      "integrity": "sha1-BF+XgtARrppoA93TgrJDkrPYkPc=",
+      "dev": true
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@@ -19645,22 +19546,70 @@
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     },
+    "ts-jest": {
+      "version": "26.3.0",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-26.3.0.tgz",
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+      "dev": true,
+      "requires": {
+        "@types/jest": "26.x",
+        "bs-logger": "0.x",
+        "buffer-from": "1.x",
+        "fast-json-stable-stringify": "2.x",
+        "jest-util": "26.x",
+        "json5": "2.x",
+        "lodash.memoize": "4.x",
+        "make-error": "1.x",
+        "mkdirp": "1.x",
+        "semver": "7.x",
+        "yargs-parser": "18.x"
+      },
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+          "requires": {
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+            "decamelize": "^1.2.0"
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+      }
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-      "resolved": "https://registry.npmjs.org/ts-json-schema-generator/-/ts-json-schema-generator-0.70.2.tgz",
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       "requires": {
-        "@types/json-schema": "^7.0.5",
-        "commander": "~5.1.0",
+        "@types/json-schema": "^7.0.6",
+        "commander": "~6.1.0",
         "glob": "~7.1.6",
         "json-stable-stringify": "^1.0.1",
-        "typescript": "~3.9.5"
+        "typescript": "~4.0.2"
       },
       "dependencies": {
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-          "resolved": "https://registry.npmjs.org/commander/-/commander-5.1.0.tgz",
-          "integrity": "sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg=="
+          "version": "6.1.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-6.1.0.tgz",
+          "integrity": "sha512-wl7PNrYWd2y5mp1OK/LhTlv8Ff4kQJQRXXAvF+uU/TPNiVJUxZLRYGj/B0y/lPGAVcSbJqH2Za/cvHmrPMC8mA=="
+        },
+        "typescript": {
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz",
+          "integrity": "sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ=="
         }
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@@ -19734,120 +19683,10 @@
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-    },
-    "typescript-json-schema": {
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-      "resolved": "https://registry.npmjs.org/typescript-json-schema/-/typescript-json-schema-0.43.0.tgz",
-      "integrity": "sha512-4c9IMlIlHYJiQtzL1gh2nIPJEjBgJjDUs50gsnnc+GFyDSK1oFM3uQIBSVosiuA/4t6LSAXDS9vTdqbQC6EcgA==",
-      "requires": {
-        "@types/json-schema": "^7.0.5",
-        "glob": "~7.1.6",
-        "json-stable-stringify": "^1.0.1",
-        "typescript": "~4.0.2",
-        "yargs": "^15.4.1"
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-            "strip-ansi": "^6.0.0",
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-          "requires": {
-            "cliui": "^6.0.0",
-            "decamelize": "^1.2.0",
-            "find-up": "^4.1.0",
-            "get-caller-file": "^2.0.1",
-            "require-directory": "^2.1.1",
-            "require-main-filename": "^2.0.0",
-            "set-blocking": "^2.0.0",
-            "string-width": "^4.2.0",
-            "which-module": "^2.0.0",
-            "y18n": "^4.0.0",
-            "yargs-parser": "^18.1.2"
-          }
-        },
-        "yargs-parser": {
-          "version": "18.1.3",
-          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
-          "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
-          "requires": {
-            "camelcase": "^5.0.0",
-            "decamelize": "^1.2.0"
-          }
-        }
-      }
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz",
+      "integrity": "sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==",
+      "dev": true
     },
     "uglify-js": {
       "version": "3.10.4",
@@ -20067,9 +19906,9 @@
       "optional": true
     },
     "v8-compile-cache": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
-      "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.1.tgz",
+      "integrity": "sha512-8OQ9CL+VWyt3JStj7HX7/ciTL2V3Rl1Wf5OL+SNTm0yK1KvtReVulksyeRnCANHHuUxHlQig+JJDlUhBt1NQDQ==",
       "dev": true
     },
     "v8-to-istanbul": {
@@ -20196,7 +20035,8 @@
     "which-module": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
-      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+      "dev": true
     },
     "which-pm-runs": {
       "version": "1.0.0",
@@ -20397,6 +20237,7 @@
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
       "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
+      "dev": true,
       "requires": {
         "ansi-styles": "^4.0.0",
         "string-width": "^4.1.0",
@@ -20406,17 +20247,20 @@
         "emoji-regex": {
           "version": "8.0.0",
           "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
+          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+          "dev": true
         },
         "is-fullwidth-code-point": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
+          "dev": true
         },
         "string-width": {
           "version": "4.2.0",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
           "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
+          "dev": true,
           "requires": {
             "emoji-regex": "^8.0.0",
             "is-fullwidth-code-point": "^3.0.0",
diff --git a/package.json b/package.json
index b2d7128b..7c558451 100644
--- a/package.json
+++ b/package.json
@@ -1,17 +1,18 @@
 {
   "name": "ncdc",
-  "version": "0.14.0",
+  "version": "1.0.0-alpha.3",
   "description": "A CLI that takes a consumer driven contract defined in yaml and allows you to run tests and/or create a fake server",
   "main": "lib/index.js",
   "bin": {
     "ncdc": "./bin/ncdc"
   },
   "files": [
+    "bin",
     "lib"
   ],
   "scripts": {
     "clean": "rm -rf ./lib ./coverage/*",
-    "typecheck": "tsc && tsc -b ./black-box-tests/shared ./black-box-tests/acceptance",
+    "typecheck": "tsc && tsc -b ./black-box-tests/acceptance",
     "compile": "babel src --out-dir lib --extensions .ts --ignore 'src/**/*.spec.ts','src/**/*.d.ts' --source-maps inline",
     "test": "jest --runInBand --bail",
     "test:watch": "npm run test -- --watch",
@@ -20,7 +21,7 @@
     "test:acceptance": "TEST_MODE=acceptance npm run test --",
     "test:prerelease": "npm run test --prefix ./black-box-tests/pre-release",
     "lint:base": "eslint --color --ignore-path .gitignore --cache",
-    "lint": "npm run lint:base -- '**/*.ts' --fix",
+    "lint": "npm run lint:base -- '**/*.ts'",
     "semantic-release": "semantic-release"
   },
   "husky": {
@@ -71,27 +72,32 @@
     "@types/node-fetch": "^2.5.7",
     "@types/qs": "^6.9.1",
     "@types/supertest": "^2.0.8",
-    "@typescript-eslint/eslint-plugin": "^2.7.0",
-    "@typescript-eslint/parser": "^2.34.0",
+    "@typescript-eslint/eslint-plugin": "^4.1.0",
+    "@typescript-eslint/parser": "^4.1.0",
     "babel-jest": "^26.0.0",
     "babel-plugin-module-resolver": "^4.0.0",
     "commitizen": "^4.0.4",
     "cz-conventional-changelog": "^3.1.0",
-    "eslint": "^6.6.0",
-    "eslint-config-prettier": "^6.5.0",
+    "eslint": "^7.8.1",
+    "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-jest": "^24.0.0",
-    "eslint-plugin-prettier": "^3.1.1",
+    "eslint-plugin-prettier": "^3.1.4",
     "husky": "^4.0.10",
     "jest": "^26.0.0",
     "lint-staged": "^10.2.2",
     "nodemon": "^2.0.1",
     "npm-run-all": "^4.1.5",
     "nyc": "^15.0.1",
-    "prettier": "^2.0.4",
+    "prettier": "^2.1.1",
     "semantic-release": "^17.0.7",
     "source-map-support": "^0.5.16",
     "strip-ansi": "^6.0.0",
-    "supertest": "^4.0.2"
+    "supertest": "^4.0.2",
+    "ts-jest": "^26.3.0",
+    "typescript": "^4.0.2"
+  },
+  "peerDependencies": {
+    "typescript": "^4.0.2"
   },
   "dependencies": {
     "@hapi/joi": "^17.1.1",
@@ -105,9 +111,7 @@
     "js-yaml": "^3.13.1",
     "node-fetch": "^2.6.0",
     "qs": "^6.9.3",
-    "ts-json-schema-generator": "^0.70.0",
-    "typescript": "^3.8.3",
-    "typescript-json-schema": "^0.43.0",
+    "ts-json-schema-generator": "^0.73.0",
     "winston": "^3.2.1",
     "yargs": "^16.0.2"
   }
diff --git a/src/config/resource/body.ts b/src/config/resource/body.ts
index ea4ad6cd..7c846ac4 100644
--- a/src/config/resource/body.ts
+++ b/src/config/resource/body.ts
@@ -1,5 +1,6 @@
 import qs from 'qs'
 
+// eslint-disable-next-line @typescript-eslint/ban-types
 const isObject = (x: unknown): x is object => typeof x === 'object' && !!x
 
 export class Body {
diff --git a/src/config/validate.spec.ts b/src/config/validate.spec.ts
index 7ae0cfb3..54b96183 100644
--- a/src/config/validate.spec.ts
+++ b/src/config/validate.spec.ts
@@ -8,8 +8,13 @@ import { Request, Response } from './resource'
 
 jest.disableAutomock()
 
+type CustomObject = Record<string, unknown>
+
 describe('validate', () => {
-  const expectValidationErors = (config?: object | object[], ...expectedErrors: string[]): string[] => {
+  const expectValidationErors = (
+    config?: CustomObject | CustomObject[],
+    ...expectedErrors: string[]
+  ): string[] => {
     const { success, errors } = validateRawConfig(
       Array.isArray(config) ? config : [config],
     ) as ValidationFailure
@@ -23,7 +28,7 @@ describe('validate', () => {
   }
 
   const expectNotToGetErrorsConcerning = (
-    config?: object | object[],
+    config?: CustomObject | CustomObject[],
     ...unexpectedStrings: string[]
   ): ValidationSuccess | ValidationFailure => {
     const validationResult = validateRawConfig(Array.isArray(config) ? config : [config])
diff --git a/src/io.ts b/src/io.ts
index 3aebcb63..d96a3970 100644
--- a/src/io.ts
+++ b/src/io.ts
@@ -12,7 +12,7 @@ export class EmptyFileError extends Error {
   }
 }
 
-export const readJsonAsync = async <TOut = object>(
+export const readJsonAsync = async <TOut = Record<string, unknown>>(
   pathSegment1: string,
   ...pathSegments: string[]
 ): Promise<TOut> => JSON.parse(await readFileAsync(resolve(pathSegment1, ...pathSegments), utf8))
@@ -36,6 +36,7 @@ export const readFixture = (basePath: string, fixturePath: string): Promise<Data
 }
 
 // TODO: swap these args around
+// eslint-disable-next-line @typescript-eslint/ban-types
 export const writeJsonAsync = async (obj: object, path: string): Promise<void> => {
   const outputPath = resolve(path)
   await mkdirAsync(dirname(outputPath), { recursive: true })
diff --git a/src/test-helpers.ts b/src/test-helpers.ts
index f4488d85..c3183d36 100644
--- a/src/test-helpers.ts
+++ b/src/test-helpers.ts
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
 /* eslint-disable @typescript-eslint/no-explicit-any */
 /* eslint-disable @typescript-eslint/explicit-function-return-type */
 export type DeepPartial<T> = {
@@ -28,4 +29,5 @@ export function randomNumber(min = 0, max = 1000): number {
   return Math.floor(Math.random() * (max - min) + min)
 }
 
+// eslint-disable-next-line @typescript-eslint/ban-types
 export const serialiseAsJson = <T extends object>(data: T): T => JSON.parse(JSON.stringify(data))
diff --git a/tests.sh b/tests.sh
index c2558d81..e7bbd587 100755
--- a/tests.sh
+++ b/tests.sh
@@ -36,6 +36,7 @@ docker-compose run integration-tests
 print 'acceptance tests'
 docker-compose run acceptance-tests
 
+print 'uploading coverage'
 bash <(curl -s https://codecov.io/bash) -Z
 
 print 'pre release tests'
diff --git a/tsconfig.jest.json b/tsconfig.jest.json
new file mode 100644
index 00000000..602f5973
--- /dev/null
+++ b/tsconfig.jest.json
@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "paths": {
+      // dirty hack just to make ts-jest work
+      // related issue: https://github.com/kulshekhar/ts-jest/issues/1648
+      "~shared/*": ["./black-box-tests/shared/*"],
+      "~*": ["src/*"]
+    }
+  }
+}