diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..de46e32
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "11:00"
+  open-pull-requests-limit: 10
diff --git a/.github/workflows/js-test-and-release.yml b/.github/workflows/js-test-and-release.yml
new file mode 100644
index 0000000..cba66b4
--- /dev/null
+++ b/.github/workflows/js-test-and-release.yml
@@ -0,0 +1,152 @@
+name: test & maybe release
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: lts/*
+    - uses: ipfs/aegir/actions/cache-node-modules@master
+    - run: npm run --if-present lint
+    - run: npm run --if-present dep-check
+
+  test-node:
+    needs: check
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+        node: [16]
+      fail-fast: true
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npm run --if-present test:node
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: node
+
+  test-chrome:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npm run --if-present test:chrome
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: chrome
+
+  test-chrome-webworker:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npm run --if-present test:chrome-webworker
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: chrome-webworker
+
+  test-firefox:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npm run --if-present test:firefox
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: firefox
+
+  test-firefox-webworker:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npm run --if-present test:firefox-webworker
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: firefox-webworker
+
+  test-electron-main:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npx xvfb-maybe npm run --if-present test:electron-main
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: electron-main
+
+  test-electron-renderer:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - run: npx xvfb-maybe npm run --if-present test:electron-renderer
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          directory: ./.nyc_output
+          flags: electron-renderer
+
+  release:
+    needs: [test-node, test-chrome, test-chrome-webworker, test-firefox, test-firefox-webworker, test-electron-main, test-electron-renderer]
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    steps:
+      - uses: actions/checkout@v2.4.0
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+      - uses: ipfs/aegir/actions/cache-node-modules@master
+      - uses: ipfs/aegir/actions/docker-login@master
+        with:
+          docker-token: ${{ secrets.DOCKER_TOKEN }}
+          docker-username: ${{ secrets.DOCKER_USERNAME }}
+      - run: npm run --if-present release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
diff --git a/.gitignore b/.gitignore
index 3c3629e..84dc48e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 node_modules
+coverage
+.nyc_output
+package-lock.json
+dist
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 08e48f4..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,3 +0,0 @@
-language: node_js
-node_js:
-  - latest
diff --git a/README.md b/README.md
index 554d22a..c7d7523 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # it-pair
 
+[![Build Status](https://github.com/alanshaw/it-pair/actions/workflows/js-test-and-release.yml/badge.svg?branch=master)](https://github.com/alanshaw/it-pair/actions/workflows/js-test-and-release.yml)
+[![Dependencies Status](https://status.david-dm.org/gh/alanshaw/it-pair.svg)](https://david-dm.org/alanshaw/it-pair)
+[![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)
+
 A pair of {source, sink} streams that are internally connected,
 (what goes into the sink comes out the source)
 
diff --git a/duplex.js b/duplex.js
deleted file mode 100644
index b037e0b..0000000
--- a/duplex.js
+++ /dev/null
@@ -1,16 +0,0 @@
-
-var Pair = require('./')
-module.exports = function () {
-  var a = Pair()
-  var b = Pair()
-  return [
-    {
-      source: a.source,
-      sink: b.sink
-    },
-    {
-      source: b.source,
-      sink: a.sink
-    }
-  ]
-}
diff --git a/index.js b/index.js
deleted file mode 100644
index 55c477b..0000000
--- a/index.js
+++ /dev/null
@@ -1,31 +0,0 @@
-'use strict'
-
-const getIterator = require('get-iterator')
-
-// a pair of streams where one drains from the other
-module.exports = function pair () {
-  let _source, onSource
-
-  const sink = async source => {
-    if (_source) throw new Error('already piped')
-    _source = getIterator(source)
-    if (onSource) onSource(_source)
-  }
-
-  const source = {
-    [Symbol.asyncIterator] () {
-      return this
-    },
-    next () {
-      if (_source) return _source.next()
-      return new Promise(resolve => {
-        onSource = source => {
-          onSource = null
-          resolve(source.next())
-        }
-      })
-    }
-  }
-
-  return { sink, source }
-}
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index cf64673..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,1732 +0,0 @@
-{
-  "name": "it-pair",
-  "version": "1.0.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
-      "dev": true
-    },
-    "acorn-jsx": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
-      "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
-      "dev": true
-    },
-    "ajv": {
-      "version": "6.10.0",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
-      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
-      "dev": true,
-      "requires": {
-        "fast-deep-equal": "^2.0.1",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.4.1",
-        "uri-js": "^4.2.2"
-      }
-    },
-    "ajv-keywords": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.4.0.tgz",
-      "integrity": "sha512-aUjdRFISbuFOl0EIZc+9e4FfZp0bDZgAdOOf30bJmw8VM9v84SHyVyxDfbWxpGYbdZD/9XoKxfHVNmxPkhwyGw==",
-      "dev": true
-    },
-    "ansi-escapes": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
-      "integrity": "sha512-cBhpre4ma+U0T1oM5fXg7Dy1Jw7zzwv7lt/GoCpr+hDQJoYnKVPLL4dCvSEFMmQurOQvSrwT7SL/DAlhBI97RQ==",
-      "dev": true
-    },
-    "ansi-regex": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-      "dev": true
-    },
-    "ansi-styles": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
-      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-      "dev": true
-    },
-    "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "requires": {
-        "sprintf-js": "~1.0.2"
-      }
-    },
-    "array-includes": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.0.3.tgz",
-      "integrity": "sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=",
-      "dev": true,
-      "requires": {
-        "define-properties": "^1.1.2",
-        "es-abstract": "^1.7.0"
-      }
-    },
-    "babel-code-frame": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
-      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
-      "dev": true,
-      "requires": {
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-        "esutils": "^2.0.2",
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-          "dev": true,
-          "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "3.0.1",
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-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^2.0.0"
-          }
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-      }
-    },
-    "balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-      "dev": true
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-      "dev": true,
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diff --git a/package.json b/package.json
index 29a9752..529adab 100644
--- a/package.json
+++ b/package.json
@@ -7,17 +7,145 @@
     "type": "git",
     "url": "git://github.com/alanshaw/it-pair.git"
   },
-  "devDependencies": {
-    "it-pipe": "^1.0.1",
-    "standard": "^12.0.1",
-    "tape": "^4.5.1"
+  "type": "module",
+  "types": "./dist/src/index.d.ts",
+  "typesVersions": {
+    "*": {
+      "*": [
+        "*",
+        "*/index",
+        "dist/*",
+        "dist/*/index",
+        "dist/src/*",
+        "dist/src/*/index"
+      ]
+    }
+  },
+  "files": [
+    "src",
+    "dist/src",
+    "!dist/test",
+    "!**/*.tsbuildinfo"
+  ],
+  "exports": {
+    ".": {
+      "import": "./dist/src/index.js"
+    },
+    "./duplex": {
+      "import": "./dist/src/duplex.js"
+    }
+  },
+  "eslintConfig": {
+    "extends": "ipfs",
+    "parserOptions": {
+      "sourceType": "module"
+    }
+  },
+  "release": {
+    "branches": [
+      "master"
+    ],
+    "plugins": [
+      [
+        "@semantic-release/commit-analyzer",
+        {
+          "preset": "conventionalcommits",
+          "releaseRules": [
+            {
+              "breaking": true,
+              "release": "major"
+            },
+            {
+              "revert": true,
+              "release": "patch"
+            },
+            {
+              "type": "feat",
+              "release": "minor"
+            },
+            {
+              "type": "fix",
+              "release": "patch"
+            },
+            {
+              "type": "chore",
+              "release": "patch"
+            },
+            {
+              "type": "docs",
+              "release": "patch"
+            },
+            {
+              "type": "test",
+              "release": "patch"
+            },
+            {
+              "scope": "no-release",
+              "release": false
+            }
+          ]
+        }
+      ],
+      [
+        "@semantic-release/release-notes-generator",
+        {
+          "preset": "conventionalcommits",
+          "presetConfig": {
+            "types": [
+              {
+                "type": "feat",
+                "section": "Features"
+              },
+              {
+                "type": "fix",
+                "section": "Bug Fixes"
+              },
+              {
+                "type": "chore",
+                "section": "Trivial Changes"
+              },
+              {
+                "type": "docs",
+                "section": "Trivial Changes"
+              },
+              {
+                "type": "test",
+                "section": "Tests"
+              }
+            ]
+          }
+        }
+      ],
+      "@semantic-release/changelog",
+      "@semantic-release/npm",
+      "@semantic-release/github",
+      "@semantic-release/git"
+    ]
   },
   "scripts": {
-    "test": "standard && set -e; for t in test/*.js; do node $t; done"
+    "lint": "aegir lint",
+    "dep-check": "aegir dep-check dist/src/**/*.js dist/test/**/*.js",
+    "build": "tsc",
+    "pretest": "npm run build",
+    "test": "aegir test -f ./dist/test",
+    "test:chrome": "npm run test -- -t browser --cov",
+    "test:chrome-webworker": "npm run test -- -t webworker",
+    "test:firefox": "npm run test -- -t browser -- --browser firefox",
+    "test:firefox-webworker": "npm run test -- -t webworker -- --browser firefox",
+    "test:node": "npm run test -- -t node --cov",
+    "test:electron-main": "npm run test -- -t electron-main",
+    "release": "semantic-release"
+  },
+  "devDependencies": {
+    "aegir": "^36.1.3",
+    "it-all": "^1.0.6",
+    "it-drain": "^1.0.5",
+    "it-pipe": "^2.0.0"
   },
-  "author": "Dominic Tarr <dominic.tarr@gmail.com> (dominictarr.com)",
+  "author": "Alan Shaw",
   "license": "MIT",
   "dependencies": {
-    "get-iterator": "^1.0.2"
+    "it-stream-types": "^1.0.3",
+    "p-defer": "^4.0.0"
   }
 }
diff --git a/src/duplex.ts b/src/duplex.ts
new file mode 100644
index 0000000..8d3c86f
--- /dev/null
+++ b/src/duplex.ts
@@ -0,0 +1,17 @@
+import { pair } from './index.js'
+import type { Duplex } from 'it-stream-types'
+
+export function duplex <T> (): [Duplex<T>, Duplex<T>] {
+  const a = pair<T>()
+  const b = pair<T>()
+  return [
+    {
+      source: a.source,
+      sink: b.sink
+    },
+    {
+      source: b.source,
+      sink: a.sink
+    }
+  ]
+}
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 0000000..ea58d9a
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,24 @@
+import defer from 'p-defer'
+import type { Source, Duplex } from 'it-stream-types'
+
+// a pair of streams where one drains from the other
+export function pair <T> (): Duplex<T> {
+  const deferred = defer<Source<T>>()
+  let piped = false
+
+  return {
+    sink: async source => {
+      if (piped) {
+        throw new Error('already piped')
+      }
+
+      piped = true
+      deferred.resolve(source)
+    },
+    source: (async function * () {
+      const source = await deferred.promise
+
+      yield * source
+    }())
+  }
+}
diff --git a/test/index.js b/test/index.js
deleted file mode 100644
index 9f52354..0000000
--- a/test/index.js
+++ /dev/null
@@ -1,59 +0,0 @@
-var pipe = require('it-pipe')
-var pair = require('../')
-var Duplex = require('../duplex')
-var tape = require('tape')
-
-tape('simple', async function (t) {
-  var p = pair()
-  var input = [1, 2, 3]
-  pipe(input, p.sink)
-  const values = await pipe(p.source, collect)
-  console.log(values) // [1, 2, 3]
-  t.deepEqual(values, input)
-  t.end()
-})
-
-tape('simple - error', async function (t) {
-  var p = pair()
-  var err = new Error('test errors')
-  pipe({ [Symbol.iterator]: async function * () { throw err } }, p.sink)
-  try {
-    await pipe(p.source, collect)
-  } catch (_err) {
-    console.log(_err)
-    t.equal(_err, err)
-    t.end()
-  }
-})
-
-tape('echo duplex', function (t) {
-  var d = Duplex()
-  pipe(
-    [1, 2, 3],
-    d[0],
-    collect
-  ).then(ary => {
-    t.deepEqual(ary, [1, 2, 3])
-    t.end()
-  })
-
-  // pipe the second duplex stream back to itself.
-  pipe(d[1], through(console.log), d[1])
-})
-
-function through (fn) {
-  return async function * (source) {
-    for await (const value of source) {
-      fn(value)
-      yield value
-    }
-  }
-}
-
-async function collect (source) {
-  const values = []
-  for await (const value of source) {
-    values.push(value)
-  }
-  return values
-}
diff --git a/test/index.spec.ts b/test/index.spec.ts
new file mode 100644
index 0000000..af5e286
--- /dev/null
+++ b/test/index.spec.ts
@@ -0,0 +1,49 @@
+import { expect } from 'aegir/utils/chai.js'
+import { pipe } from 'it-pipe'
+import { pair } from '../src/index.js'
+import { duplex } from '../src/duplex.js'
+import all from 'it-all'
+import drain from 'it-drain'
+
+describe('it-pair', () => {
+  it('simple', async () => {
+    const p = pair<number>()
+    const input = [1, 2, 3]
+    await pipe(
+      input,
+      p.sink
+    )
+    const values = await pipe(
+      p.source,
+      async (source) => await all(source)
+    )
+    expect(values).to.deep.equal(input)
+  })
+
+  it('simple - error', async () => {
+    const p = pair<number>()
+    const err = new Error('test errors')
+
+    await pipe(
+      (async function * () { throw err }()), // eslint-disable-line require-yield
+      p.sink
+    )
+
+    await expect(pipe(p.source, drain)).to.eventually.be.rejectedWith(/test errors/)
+  })
+
+  it('echo duplex', async () => {
+    const d = duplex<number>()
+    const p = pipe(
+      [1, 2, 3],
+      d[0],
+      async (source) => await all(source)
+    )
+
+    // pipe the second duplex stream back to itself.
+    void pipe(d[1], d[1])
+
+    const result = await p
+    expect(result).to.deep.equal([1, 2, 3])
+  })
+})
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..f296f99
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "extends": "aegir/src/config/tsconfig.aegir.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "emitDeclarationOnly": false,
+    "module": "ES2020"
+  },
+  "include": [
+    "src",
+    "test"
+  ]
+}