diff --git a/.travis.yml b/.travis.yml
index d0cf281..6aeb9f6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,18 +1,29 @@
 language: node_js
+dist: bionic
 cache: npm
 stages:
   - check
   - test
   - cov
 
+branches:
+  only:
+  - master
+  - /^release\/.*$/
+
 node_js:
-  - '10'
+  - 'lts/*'
+  - 'node'
 
 os:
   - linux
   - osx
   - windows
 
+before_install:
+  # modules with pre-built binaries may not have deployed versions for bleeding-edge node so this lets us fall back to building from source
+  - npm install -g @mapbox/node-pre-gyp
+
 script: npx nyc -s npm run test:node -- --bail
 after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
 
@@ -20,7 +31,6 @@ jobs:
   include:
     - stage: check
       script:
-        - npx aegir commitlint --travis
         - npx aegir dep-check
         - npm run lint
 
@@ -28,13 +38,14 @@ jobs:
       name: chrome
       addons:
         chrome: stable
-      script: npx aegir test -t browser -t webworker
+      script:
+        - npx aegir test -t browser -t webworker
 
     - stage: test
       name: firefox
       addons:
         firefox: latest
-      script: npx aegir test -t browser -t webworker -- --browsers FirefoxHeadless
+      script: npx aegir test -t browser -t webworker -- --browser firefox
 
 notifications:
   email: false
diff --git a/package.json b/package.json
index d6cc2b9..4e5d3ff 100644
--- a/package.json
+++ b/package.json
@@ -4,17 +4,18 @@
   "description": "JavaScript Implementation of BlockService",
   "leadMaintainer": "Volker Mische <volker.mische@gmail.com>",
   "main": "src/index.js",
+  "types": "dist/src/index.d.ts",
   "scripts": {
+    "prepare": "aegir build --no-bundle",
     "lint": "aegir lint",
-    "build": "aegir build",
+    "prepublishOnly": "aegir build",
     "test": "aegir test",
     "test:node": "aegir test --target node",
     "test:browser": "aegir test --target browser",
     "release": "aegir release --docs",
     "release-minor": "aegir release --type minor --docs",
     "release-major": "aegir release --type major --docs",
-    "coverage": "aegir coverage",
-    "coverage-publish": "aegir coverage --provider coveralls",
+    "coverage": "aegir test -t node --cov && nyc report --reporter=html",
     "docs": "aegir docs"
   },
   "repository": {
@@ -30,24 +31,31 @@
   },
   "homepage": "https://github.com/ipfs/js-ipfs-block-service#readme",
   "devDependencies": {
+    "@types/fs-extra": "^9.0.8",
+    "@types/lodash.range": "^3.2.6",
     "abort-controller": "^3.0.0",
-    "aegir": "^22.0.0",
+    "aegir": "^31.0.4",
+    "assert": "^2.0.0",
     "cids": "^1.0.0",
+    "events": "^3.3.0",
     "fs-extra": "^9.0.0",
-    "ipfs-repo": "^6.0.0",
-    "ipld-block": "^0.10.0",
+    "ipfs-repo": "^9.0.0",
+    "ipld-block": "^0.11.1",
+    "it-all": "^1.0.5",
     "it-drain": "^1.0.1",
-    "lodash": "^4.17.11",
+    "lodash.range": "^3.2.0",
     "multihashing-async": "^2.0.1",
-    "uint8arrays": "^2.1.2"
+    "native-abort-controller": "^1.0.3",
+    "uint8arrays": "^2.1.2",
+    "util": "^0.12.3"
   },
   "engines": {
     "node": ">=12.0.0",
     "npm": ">=3.0.0"
   },
   "dependencies": {
-    "err-code": "^2.0.0",
-    "streaming-iterables": "^5.0.2"
+    "err-code": "^3.0.1",
+    "it-map": "^1.0.5"
   },
   "contributors": [
     "David Dias <daviddias.p@gmail.com>",
diff --git a/src/index.js b/src/index.js
index 8b5369d..2ddadc7 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,8 +1,14 @@
 'use strict'
 
-const { map } = require('streaming-iterables')
+const map = require('it-map')
 const errcode = require('err-code')
 
+/**
+ * @typedef {import('ipfs-repo')} IPFSRepo
+ * @typedef {import('ipld-block')} Block
+ * @typedef {import('cids')} CID
+ */
+
 /**
  * BlockService is a hybrid block datastore. It stores data in a local
  * datastore and may retrieve data from a remote Exchange.
@@ -26,8 +32,7 @@ class BlockService {
    * If the node is online all requests for blocks first
    * check locally and afterwards ask the network for the blocks.
    *
-   * @param {Bitswap} bitswap
-   * @returns {void}
+   * @param {any} bitswap
    */
   setExchange (bitswap) {
     this._bitswap = bitswap
@@ -35,8 +40,6 @@ class BlockService {
 
   /**
    * Go offline, i.e. drop the reference to bitswap.
-   *
-   * @returns {void}
    */
   unsetExchange () {
     this._bitswap = null
@@ -44,8 +47,6 @@ class BlockService {
 
   /**
    * Is the blockservice online, i.e. is bitswap present.
-   *
-   * @returns {bool}
    */
   hasExchange () {
     return this._bitswap != null
@@ -55,9 +56,9 @@ class BlockService {
    * Put a block to the underlying datastore.
    *
    * @param {Block} block
-   * @param {Object} [options] -  Options is an object with the following properties
+   * @param {object} [options] -  Options is an object with the following properties
    * @param {AbortSignal} [options.signal] - A signal that can be used to abort any long-lived operations that are started as a result of this operation
-   * @returns {Promise}
+   * @returns {Promise<Block>}
    */
   put (block, options) {
     if (this.hasExchange()) {
@@ -70,10 +71,10 @@ class BlockService {
   /**
    * Put a multiple blocks to the underlying datastore.
    *
-   * @param {AsyncIterator<Block>} blocks
-   * @param {Object} [options] -  Options is an object with the following properties
+   * @param {AsyncIterable<Block> | Iterable<Block>} blocks
+   * @param {object} [options] -  Options is an object with the following properties
    * @param {AbortSignal} [options.signal] - A signal that can be used to abort any long-lived operations that are started as a result of this operation
-   * @returns {Promise}
+   * @returns {AsyncIterable<Block>}
    */
   putMany (blocks, options) {
     if (this.hasExchange()) {
@@ -87,7 +88,7 @@ class BlockService {
    * Get a block by cid.
    *
    * @param {CID} cid
-   * @param {Object} [options] -  Options is an object with the following properties
+   * @param {object} [options] -  Options is an object with the following properties
    * @param {AbortSignal} [options.signal] - A signal that can be used to abort any long-lived operations that are started as a result of this operation
    * @returns {Promise<Block>}
    */
@@ -102,10 +103,10 @@ class BlockService {
   /**
    * Get multiple blocks back from an array of cids.
    *
-   * @param {AsyncIterator<CID>} cids
-   * @param {Object} [options] -  Options is an object with the following properties
+   * @param {AsyncIterable<CID> | Iterable<CID>} cids
+   * @param {object} [options] -  Options is an object with the following properties
    * @param {AbortSignal} [options.signal] - A signal that can be used to abort any long-lived operations that are started as a result of this operation
-   * @returns {AsyncIterator<Block>}
+   * @returns {AsyncIterable<Block>}
    */
   getMany (cids, options) {
     if (!Array.isArray(cids)) {
@@ -115,8 +116,7 @@ class BlockService {
     if (this.hasExchange()) {
       return this._bitswap.getMany(cids, options)
     } else {
-      const getRepoBlocks = map((cid) => this._repo.blocks.get(cid, options))
-      return getRepoBlocks(cids)
+      return map(cids, (cid) => this._repo.blocks.get(cid, options))
     }
   }
 
@@ -124,9 +124,8 @@ class BlockService {
    * Delete a block from the blockstore.
    *
    * @param {CID} cid
-   * @param {Object} [options] -  Options is an object with the following properties
+   * @param {object} [options] -  Options is an object with the following properties
    * @param {AbortSignal} [options.signal] - A signal that can be used to abort any long-lived operations that are started as a result of this operation
-   * @returns {Promise}
    */
   async delete (cid, options) {
     if (!await this._repo.blocks.has(cid)) {
@@ -139,10 +138,9 @@ class BlockService {
   /**
    * Delete multiple blocks from the blockstore.
    *
-   * @param {AsyncIterator<CID>} cids
-   * @param {Object} [options] -  Options is an object with the following properties
+   * @param {AsyncIterable<CID> | Iterable<CID>} cids
+   * @param {object} [options] -  Options is an object with the following properties
    * @param {AbortSignal} [options.signal] - A signal that can be used to abort any long-lived operations that are started as a result of this operation
-   * @returns {Promise}
    */
   deleteMany (cids, options) {
     const repo = this._repo
diff --git a/test/aborting-requests.spec.js b/test/aborting-requests.spec.js
index d0bfce8..035531b 100644
--- a/test/aborting-requests.spec.js
+++ b/test/aborting-requests.spec.js
@@ -3,17 +3,26 @@
 
 const { expect } = require('aegir/utils/chai')
 
-const { collect } = require('streaming-iterables')
-const AbortController = require('abort-controller')
+const all = require('it-all')
+const { AbortController } = require('native-abort-controller')
 
 const BlockService = require('../src')
 
+/**
+ * @typedef {import('ipfs-repo')} IPFSRepo
+ */
+
 describe('aborting requests', () => {
+  /** @type {Error} */
   let abortedErr
+  /** @type {BlockService} */
   let r
 
   beforeEach(() => {
     abortedErr = new Error('Aborted!')
+    /**
+     * @param {...any} args
+     */
     const abortOnSignal = (...args) => {
       const { signal } = args[args.length - 1]
 
@@ -24,14 +33,17 @@ describe('aborting requests', () => {
       })
     }
 
+    /** @type {IPFSRepo} */
     const repo = {
       blocks: {
         put: abortOnSignal,
+        // @ts-ignore should return async iterable
         putMany: abortOnSignal,
         get: abortOnSignal,
         delete: abortOnSignal,
+        // @ts-ignore should return async iterable
         deleteMany: abortOnSignal,
-        has: () => true
+        has: () => Promise.resolve(true)
       }
     }
     r = new BlockService(repo)
@@ -41,6 +53,7 @@ describe('aborting requests', () => {
     const controller = new AbortController()
     setTimeout(() => controller.abort(), 1)
 
+    // @ts-expect-error does not take string
     await expect(r.put('block', {
       signal: controller.signal
     })).to.eventually.rejectedWith(abortedErr)
@@ -50,6 +63,7 @@ describe('aborting requests', () => {
     const controller = new AbortController()
     setTimeout(() => controller.abort(), 1)
 
+    // @ts-expect-error does not take string array
     await expect(r.putMany(['block'], {
       signal: controller.signal
     })).to.eventually.rejectedWith(abortedErr)
@@ -59,6 +73,7 @@ describe('aborting requests', () => {
     const controller = new AbortController()
     setTimeout(() => controller.abort(), 1)
 
+    // @ts-expect-error does not take string
     await expect(r.get('cid', {
       signal: controller.signal
     })).to.eventually.rejectedWith(abortedErr)
@@ -68,7 +83,8 @@ describe('aborting requests', () => {
     const controller = new AbortController()
     setTimeout(() => controller.abort(), 1)
 
-    await expect(collect(r.getMany(['cid'], {
+    // @ts-expect-error does not take string array
+    await expect(all(r.getMany(['cid'], {
       signal: controller.signal
     }))).to.eventually.rejectedWith(abortedErr)
   })
@@ -77,6 +93,7 @@ describe('aborting requests', () => {
     const controller = new AbortController()
     setTimeout(() => controller.abort(), 1)
 
+    // @ts-expect-error does not take string
     await expect(r.delete('cid', {
       signal: controller.signal
     })).to.eventually.rejectedWith(abortedErr)
diff --git a/test/block-service-test.js b/test/block-service-test.js
index 92f984a..198b559 100644
--- a/test/block-service-test.js
+++ b/test/block-service-test.js
@@ -4,18 +4,27 @@
 const { expect } = require('aegir/utils/chai')
 
 const Block = require('ipld-block')
-const _ = require('lodash')
-const { collect } = require('streaming-iterables')
+const range = require('lodash.range')
+const all = require('it-all')
 const CID = require('cids')
 const multihashing = require('multihashing-async')
 const uint8ArrayFromString = require('uint8arrays/from-string')
 const drain = require('it-drain')
 
+/**
+ * @typedef {import('ipfs-repo')} IPFSRepo
+ */
+
 const BlockService = require('../src')
 
+/**
+ * @param {IPFSRepo} repo
+ */
 module.exports = (repo) => {
   describe('block-service', () => {
+    /** @type {BlockService} */
     let bs
+    /** @type {Block[]} */
     let testBlocks
 
     before(async () => {
@@ -72,7 +81,7 @@ module.exports = (repo) => {
 
       it('get many blocks through .getMany', async () => {
         const cids = testBlocks.map(b => b.cid)
-        const blocks = await collect(bs.getMany(cids))
+        const blocks = await all(bs.getMany(cids))
         expect(blocks).to.eql(testBlocks)
       })
 
@@ -121,7 +130,7 @@ module.exports = (repo) => {
       it('stores and gets lots of blocks', async function () {
         this.timeout(20 * 1000)
 
-        const data = _.range(1000).map((i) => {
+        const data = range(1000).map((i) => {
           return uint8ArrayFromString(`hello-${i}-${Math.random()}`)
         })
 
@@ -158,6 +167,9 @@ module.exports = (repo) => {
       it('retrieves a block through bitswap', async () => {
         // returns a block with a value equal to its key
         const bitswap = {
+          /**
+           * @param {CID} cid
+           */
           get (cid) {
             return new Block(uint8ArrayFromString('secret'), cid)
           }
@@ -174,8 +186,12 @@ module.exports = (repo) => {
       })
 
       it('puts the block through bitswap', async () => {
+        /** @type {Block[]} */
         const puts = []
         const bitswap = {
+          /**
+           * @param {Block} block
+           */
           put (block) {
             puts.push(block)
           }
diff --git a/test/browser.js b/test/browser.js
index fa97598..53222af 100644
--- a/test/browser.js
+++ b/test/browser.js
@@ -7,8 +7,11 @@ const IPFSRepo = require('ipfs-repo')
 const tests = require('./block-service-test')
 
 const idb = self.indexedDB ||
+        // @ts-ignore
         self.mozIndexedDB ||
+        // @ts-ignore
         self.webkitIndexedDB ||
+        // @ts-ignore
         self.msIndexedDB
 
 idb.deleteDatabase('ipfs')
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..7371337
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "extends": "./node_modules/aegir/src/config/tsconfig.aegir.json",
+  "compilerOptions": {
+    "outDir": "dist"
+  },
+  "include": [
+    "test",
+    "src"
+  ]
+}