diff --git a/.circleci/config.yml b/.circleci/config.yml
index 50ae73f..09cdf23 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -71,10 +71,6 @@ jobs:
           name: Write auth-token
           command: echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > ~/repo/.npmrc
     
-      - run:
-          name: Install dot-json
-          command: npm install dot-json
-
       - run:
           name: update version
           command: $(yarn bin)/dot-json package.json version ${CIRCLE_TAG:1}
diff --git a/package.json b/package.json
index 929aaee..9da49fc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "io-guard",
-  "version": "0.2.0",
+  "version": "0.2.2",
   "main": "./bundle.common.js",
   "module": "./bundle.es6.mjs",
   "types": "./dist/index.d.ts",
@@ -27,6 +27,7 @@
     "@types/jest": "22",
     "babel-core": "^7.0.0-beta.3",
     "codecov": "^3.0.4",
+    "dot-json": "^1.0.4",
     "jest": "22",
     "rollup": "^0.62.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
diff --git a/src/index.ts b/src/index.ts
index f1227c4..885e1e3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,4 @@
-import { ValidatorMap, ObjectTypeGuard, ValueMap, ValueTypeGuard, IterableTypeGuard, ArrayTypeGuard } from "./types";
+import { ValidatorMap, ObjectTypeGuard, ValueMap, ValueTypeGuard, ArrayTypeGuard } from "./types";
 
 
 const Guard = <T>(validators: ValidatorMap<T>): ObjectTypeGuard<T> => (
@@ -28,4 +28,4 @@ const GuardEach = <T>(
 export { Guard, GuardEach };
 
 export { isNumber, isString, isBoolean, isArray } from "./guards/guards";
-export { compose, and, or, optional, nullable, erratic } from "./operators/operators";
+export { compose, and, or, optional, nullable, erratic, unsafeTest, customTest } from "./operators/operators";
diff --git a/yarn.lock b/yarn.lock
index 5538724..19681ef 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -880,12 +880,23 @@ diff@^3.2.0:
   version "3.5.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
 
+docopt@~0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/docopt/-/docopt-0.6.2.tgz#b28e9e2220da5ec49f7ea5bb24a47787405eeb11"
+
 domexception@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/domexception/-/domexception-1.0.1.tgz#937442644ca6a31261ef36e3ec677fe805582c90"
   dependencies:
     webidl-conversions "^4.0.2"
 
+dot-json@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/dot-json/-/dot-json-1.0.4.tgz#b5c5818eb526a7917ac02df017fe9fba37b11195"
+  dependencies:
+    docopt "~0.6.2"
+    underscore-keypath "~0.0.22"
+
 duplexer@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
@@ -3277,6 +3288,16 @@ uglify-to-browserify@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz#6e0924d6bda6b5afe349e39a6d632850a0f882b7"
 
+underscore-keypath@~0.0.22:
+  version "0.0.22"
+  resolved "https://registry.yarnpkg.com/underscore-keypath/-/underscore-keypath-0.0.22.tgz#48a528392bb6efc424be1caa56da4b5faccf264d"
+  dependencies:
+    underscore "*"
+
+underscore@*:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.1.tgz#06dce34a0e68a7babc29b365b8e74b8925203961"
+
 union-value@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.0.tgz#5c71c34cb5bad5dcebe3ea0cd08207ba5aa1aea4"