diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c739e15..ac97dc1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [ '14.17.6', '16.9.1' ]
+        node: [ '14.17.5', '16.13.0', '17.1.0' ]
     name: Test on Node.js ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v2
diff --git a/.gitignore b/.gitignore
index 58b0944..d867837 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,7 +3,6 @@
 **/.nyc_output/
 **/.vscode/
 **/bin/
-**/build/
 **/coverage/
 **/lib/
 **/node_modules/
diff --git a/.npmignore b/.npmignore
index b555454..e81fa61 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,8 +1,7 @@
 **/.*
-**/.*/
-**/build/
 **/coverage/
 **/src/
 **/test/
 **/CODE_OF_CONDUCT.md
+**/CONTRIBUTING.md
 **/tsconfig.json
diff --git a/.travis.yml b/.travis.yml
index a53fbb7..f74c84b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ language: node_js
 node_js:
   - 14
   - 16
+  - 17
 notifications:
   email: false
 script:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c262f9b..53ec2a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # ChangeLogs
 
+## Version 1.1.10
+
+- :building_construction: Migration from `terser` to `esbuild`
+- :arrow_up: Packages for development are updated
+  - `@types/node` is upgraded from 16.10.1 to 16.11.7
+  - `@typescript-eslint/eslint-plugin` is upgraded from 4.32.0 to 5.3.1
+  - `@typescript-eslint/parser` is upgraded from 4.32.0 to 5.3.1
+  - `eslint` is upgraded from 7.32.0 to 8.2.0
+  - `mocha` is upgraded from 9.1.2 to 9.1.3
+  - `ts-node` is upgraded from 10.2.1 to 10.4.0
+  - `typescript` is upgraded from 4.4.3 to 4.4.4
+
 ## Version 1.1.9
 
 - :arrow_up: Packages for development are updated
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..a4b6000
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,92 @@
+# Contributing
+
+When contributing to this repository, please first discuss the change you wish to make via issue,
+email, or any other method with the owners of this repository before making a change. 
+
+Please note we have a code of conduct, please follow it in all your interactions with the project.
+
+## Pull Request Process
+
+1. Ensure any install or build dependencies are removed before the end of the layer when doing a 
+   build.
+2. Update the README.md with details of changes to the interface, this includes new environment 
+   variables, exposed ports, useful file locations and container parameters.
+3. Increase the version numbers in any examples files and the README.md to the new version that this
+   Pull Request would represent. The versioning scheme we use is [SemVer](http://semver.org/).
+4. You may merge the Pull Request in once you have the sign-off of two other developers, or if you 
+   do not have permission to do that, you may request the second reviewer to merge it for you.
+
+## Code of Conduct
+
+### Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+### Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+### Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+### Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+### Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at km.8k6ce+github@gmail.com. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+### Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/
diff --git a/README.md b/README.md
index 27e9fed..a8f3cba 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ npm i @kei-g/iterators
 [npm-image]:https://img.shields.io/npm/v/@kei-g/iterators?logo=npm
 [npm-url]:https://npmjs.com/@kei-g/iterators
 [npmsio-url]:https://npms.io/search?q=%40kei-g%2Fiterators
-[nyc-cov-image]:https://img.shields.io/nycrc/kei-g/iterators?config=.nycrc.json&label=coverage
+[nyc-cov-image]:https://img.shields.io/nycrc/kei-g/iterators?config=.nycrc.json&label=coverage&logo=mocha
 [quality-image]:https://img.shields.io/npms-io/quality-score/@kei-g/iterators?logo=npm
-[travis-image]:https://img.shields.io/travis/com/kei-g/iterators/main.svg?logo=travis
+[travis-image]:https://img.shields.io/travis/com/kei-g/iterators/main.svg?label=test%20%26%20build&logo=travis
 [travis-url]:https://app.travis-ci.com/github/kei-g/iterators
diff --git a/package.json b/package.json
index 925bf98..90c85b1 100644
--- a/package.json
+++ b/package.json
@@ -10,18 +10,18 @@
   "devDependencies": {
     "@types/chai": "^4.2.22",
     "@types/mocha": "^9.0.0",
-    "@types/node": "^16.10.1",
-    "@typescript-eslint/eslint-plugin": "^4.32.0",
-    "@typescript-eslint/parser": "^4.32.0",
+    "@types/node": "^16.11.7",
+    "@typescript-eslint/eslint-plugin": "^5.3.1",
+    "@typescript-eslint/parser": "^5.3.1",
     "chai": "^4.3.4",
-    "eslint": "^7.32.0",
-    "mocha": "^9.1.2",
+    "esbuild": "^0.13.13",
+    "eslint": "^8.2.0",
+    "mocha": "^9.1.3",
     "npm-run-all": "^4.1.5",
     "nyc": "^15.1.0",
     "rimraf": "^3.0.2",
-    "terser": "^5.9.0",
-    "ts-node": "^10.2.1",
-    "typescript": "^4.4.3"
+    "ts-node": "^10.4.0",
+    "typescript": "^4.4.4"
   },
   "engines": {
     "node": ">=14.17.5"
@@ -40,27 +40,12 @@
   "publishConfig": {
     "access": "public"
   },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/kei-g/iterators.git"
-  },
+  "repository": "github:kei-g/iterators",
   "scripts": {
-    "build": "npm-run-all -p clean lint -s build:tsc -p build:terse:* build:terse:lib:*",
-    "build:terse:index": "terser build/index.js -c -m -o index.js --toplevel",
-    "build:terse:lib:circular": "terser build/lib/circular.js -c -m -o lib/circular.js --toplevel",
-    "build:terse:lib:concat": "terser build/lib/concat.js -c -m -o lib/concat.js --toplevel",
-    "build:terse:lib:empty": "terser build/lib/empty.js -c -m -o lib/empty.js --toplevel",
-    "build:terse:lib:index": "terser build/lib/index.js -c -m -o lib/index.js --toplevel",
-    "build:terse:lib:iterators": "terser build/lib/iterators.js -c -m -o lib/iterators.js --toplevel",
-    "build:terse:lib:lazy": "terser build/lib/lazy.js -c -m -o lib/lazy.js --toplevel",
-    "build:terse:lib:linear-number-series": "terser build/lib/linear-number-series.js -c -m -o lib/linear-number-series.js --toplevel",
-    "build:terse:lib:multiplex": "terser build/lib/multiplex.js -c -m -o lib/multiplex.js --toplevel",
-    "build:terse:lib:single": "terser build/lib/single.js -c -m -o lib/single.js --toplevel",
-    "build:terse:lib:take": "terser build/lib/take.js -c -m -o lib/take.js --toplevel",
-    "build:terse:lib:transform": "terser build/lib/transform.js -c -m -o lib/transform.js --toplevel",
-    "build:terse:lib:zip": "terser build/lib/zip.js -c -m -o lib/zip.js --toplevel",
+    "build": "npm-run-all -p clean lint -p build:bundle build:tsc",
+    "build:bundle": "esbuild src/index.ts --bundle --minify --outfile=index.js --platform=node --target=ES2020",
     "build:tsc": "tsc",
-    "clean": "rimraf build/ index.d.ts index.js lib/",
+    "clean": "rimraf .nyc_output/ coverage/ index.d.ts index.js lib/",
     "cover": "nyc --check-coverage -r html -r text _mocha",
     "lint": "eslint src/**/*.ts",
     "postpublish": "run-s clean",
diff --git a/tsconfig.json b/tsconfig.json
index 73b368b..1ef48b0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,6 +5,7 @@
     "declaration": true,
     "declarationDir": ".",
     "downlevelIteration": true,
+    "emitDeclarationOnly": true,
     "emitDecoratorMetadata": false,
     "esModuleInterop": true,
     "experimentalDecorators": false,
@@ -14,7 +15,6 @@
     "module": "CommonJS",
     "moduleResolution": "node",
     "newLine": "lf",
-    "outDir": "build",
     "pretty": true,
     "removeComments": false,
     "skipLibCheck": true,