diff --git a/.travis.yml b/.travis.yml
index f217408..b437ba0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,16 @@
 language: node_js
 cache: npm
+dist: bionic
 stages:
   - check
   - test
   - cov
 
+branches:
+  only:
+  - master
+  - /^release\/.*$/
+
 node_js:
   - 'lts/*'
   - 'node'
@@ -21,7 +27,6 @@ jobs:
   include:
     - stage: check
       script:
-        - npx aegir commitlint --travis
         - npx aegir dep-check
         - npm run lint
 
@@ -35,7 +40,7 @@ jobs:
       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
 
     - stage: test
       name: electron-main
diff --git a/package.json b/package.json
index 662c0ee..d5d1a9f 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "src",
     "dist"
   ],
+  "types": "./dist/src/index.d.ts",
   "main": "src/index.js",
   "browser": {
     "fs": false
@@ -29,28 +30,27 @@
     "url": "https://github.com/ipfs/is-ipfs.git"
   },
   "scripts": {
+    "prepare": "aegir build --no-bundle",
     "test:node": "aegir test --target node",
     "test:browser": "aegir test --target browser",
     "test": "aegir test",
+    "prepublishOnly": "aegir build",
     "lint": "aegir lint && aegir lint-package-json",
     "release": "aegir release",
     "release-minor": "aegir release --type minor",
-    "release-major": "aegir release --type major",
-    "build": "aegir build",
-    "coverage": "aegir coverage",
-    "coverage-publish": "aegir coverage --upload"
+    "release-major": "aegir release --type major"
   },
   "dependencies": {
     "cids": "^1.1.5",
-    "iso-url": "^1.0.0",
+    "iso-url": "^1.1.0",
     "mafmt": "^8.0.4",
     "multiaddr": "^8.1.2",
-    "multibase": "^3.1.1",
-    "multihashes": "^3.1.2",
+    "multibase": "^4.0.1",
+    "multihashes": "^4.0.0",
     "uint8arrays": "^2.0.5"
   },
   "devDependencies": {
-    "aegir": "^30.3.0",
+    "aegir": "^31.0.0",
     "pre-commit": "^1.2.2"
   },
   "engines": {
diff --git a/src/index.js b/src/index.js
index ad18edb..24bde7e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -21,6 +21,9 @@ const subdomainProtocolMatch = 2
 // Fully qualified domain name (FQDN) that has an explicit .tld suffix
 const fqdnWithTld = /^(([a-z0-9]|[a-z0-9][a-z0-9-]*[a-z0-9])\.)+([a-z0-9]|[a-z0-9][a-z0-9-]*[a-z0-9])$/
 
+/**
+ * @param {*} hash
+ */
 function isMultihash (hash) {
   const formatted = convertToString(hash)
   try {
@@ -31,6 +34,9 @@ function isMultihash (hash) {
   }
 }
 
+/**
+ * @param {*} hash
+ */
 function isMultibase (hash) {
   try {
     return multibase.isEncoded(hash)
@@ -39,6 +45,9 @@ function isMultibase (hash) {
   }
 }
 
+/**
+ * @param {*} hash
+ */
 function isCID (hash) {
   try {
     new CID(hash) // eslint-disable-line no-new
@@ -48,6 +57,9 @@ function isCID (hash) {
   }
 }
 
+/**
+ * @param {*} input
+ */
 function isMultiaddr (input) {
   if (!input) return false
   if (Multiaddr.isMultiaddr(input)) return true
@@ -59,10 +71,19 @@ function isMultiaddr (input) {
   }
 }
 
+/**
+ * @param {string | Uint8Array | Multiaddr} input
+ */
 function isPeerMultiaddr (input) {
   return isMultiaddr(input) && (mafmt.P2P.matches(input) || mafmt.DNS.matches(input))
 }
 
+/**
+ * @param {string | Uint8Array} input
+ * @param {RegExp | string} pattern
+ * @param {number} [protocolMatch=1]
+ * @param {number} [hashMatch=2]
+ */
 function isIpfs (input, pattern, protocolMatch = defaultProtocolMatch, hashMatch = defaultHashMath) {
   const formatted = convertToString(input)
   if (!formatted) {
@@ -83,14 +104,21 @@ function isIpfs (input, pattern, protocolMatch = defaultProtocolMatch, hashMatch
   if (hash && pattern === subdomainGatewayPattern) {
     // when doing checks for subdomain context
     // ensure hash is case-insensitive
-    // (browsers force-lowercase authority compotent anyway)
+    // (browsers force-lowercase authority component anyway)
     hash = hash.toLowerCase()
   }
 
   return isCID(hash)
 }
 
-function isIpns (input, pattern, protocolMatch = defaultProtocolMatch, hashMatch) {
+/**
+ *
+ * @param {string | Uint8Array} input
+ * @param {string | RegExp} pattern
+ * @param {number} [protocolMatch=1]
+ * @param {number} [hashMatch=1]
+ */
+function isIpns (input, pattern, protocolMatch = defaultProtocolMatch, hashMatch = defaultHashMath) {
   const formatted = convertToString(input)
   if (!formatted) {
     return false
@@ -133,10 +161,16 @@ function isIpns (input, pattern, protocolMatch = defaultProtocolMatch, hashMatch
   return true
 }
 
+/**
+ * @param {any} input
+ */
 function isString (input) {
   return typeof input === 'string'
 }
 
+/**
+ * @param {Uint8Array | string} input
+ */
 function convertToString (input) {
   if (input instanceof Uint8Array) {
     return uint8ArrayToString(input, 'base58btc')
@@ -149,14 +183,35 @@ function convertToString (input) {
   return false
 }
 
+/**
+ * @param {string | Uint8Array} url
+ */
 const ipfsSubdomain = (url) => isIpfs(url, subdomainGatewayPattern, subdomainProtocolMatch, subdomainIdMatch)
+/**
+ * @param {string | Uint8Array} url
+ */
 const ipnsSubdomain = (url) => isIpns(url, subdomainGatewayPattern, subdomainProtocolMatch, subdomainIdMatch)
+/**
+ * @param {string | Uint8Array} url
+ */
 const subdomain = (url) => ipfsSubdomain(url) || ipnsSubdomain(url)
 
+/**
+ * @param {string | Uint8Array} url
+ */
 const ipfsUrl = (url) => isIpfs(url, pathGatewayPattern) || ipfsSubdomain(url)
+/**
+ * @param {string | Uint8Array} url
+ */
 const ipnsUrl = (url) => isIpns(url, pathGatewayPattern) || ipnsSubdomain(url)
+/**
+ * @param {string | Uint8Array} url
+ */
 const url = (url) => ipfsUrl(url) || ipnsUrl(url) || subdomain(url)
 
+/**
+ * @param {string | Uint8Array} path
+ */
 const path = (path) => isIpfs(path, pathPattern) || isIpns(path, pathPattern)
 
 module.exports = {
@@ -164,6 +219,9 @@ module.exports = {
   multiaddr: isMultiaddr,
   peerMultiaddr: isPeerMultiaddr,
   cid: isCID,
+  /**
+   * @param {CID | string | Uint8Array} cid
+   */
   base32cid: (cid) => (isMultibase(cid) === 'base32' && isCID(cid)),
   ipfsSubdomain,
   ipnsSubdomain,
@@ -173,10 +231,22 @@ module.exports = {
   ipnsUrl,
   url,
   pathGatewayPattern: pathGatewayPattern,
+  /**
+   * @param {string | Uint8Array} path
+   */
   ipfsPath: (path) => isIpfs(path, pathPattern),
+  /**
+   * @param {string | Uint8Array} path
+   */
   ipnsPath: (path) => isIpns(path, pathPattern),
   path,
   pathPattern,
+  /**
+   * @param {string | Uint8Array} x
+   */
   urlOrPath: (x) => url(x) || path(x),
+  /**
+   * @param {string | Uint8Array | CID} path
+   */
   cidPath: path => isString(path) && !isCID(path) && isIpfs(`/ipfs/${path}`, pathPattern)
 }
diff --git a/test/test-cid.spec.js b/test/test-cid.spec.js
index 68d42d8..f3d090e 100644
--- a/test/test-cid.spec.js
+++ b/test/test-cid.spec.js
@@ -101,6 +101,7 @@ describe('ipfs base32cid', () => {
   })
 
   it('isIPFS.base32cid should not match an invalid CID data type', (done) => {
+    // @ts-ignore data type is invalid
     const actual = isIPFS.base32cid(4)
     expect(actual).to.equal(false)
     done()
diff --git a/test/test-multiaddr.spec.js b/test/test-multiaddr.spec.js
index ee5a984..0ab9066 100644
--- a/test/test-multiaddr.spec.js
+++ b/test/test-multiaddr.spec.js
@@ -159,6 +159,7 @@ describe('ipfs peerMultiaddr', () => {
   })
 
   it('isIPFS.peerMultiaddr should not match an invalid multiaddr data type', (done) => {
+    // @ts-ignore data type is invalid
     const actual = isIPFS.peerMultiaddr(4)
     expect(actual).to.equal(false)
     done()
diff --git a/test/test-path.spec.js b/test/test-path.spec.js
index a200f1d..53e8562 100644
--- a/test/test-path.spec.js
+++ b/test/test-path.spec.js
@@ -148,6 +148,7 @@ describe('ipfs path', () => {
   })
 
   it('isIPFS.cidPath should not match a non string', () => {
+    // @ts-ignore data type is invalid
     const actual = isIPFS.cidPath({ toString: () => 'QmYHNYAaYK5hm3ZhZFx5W9H6xydKDGimjdgJMrMSdnctEm/path/to/file' })
     expect(actual).to.equal(false)
   })
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..77830df
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "extends": "./node_modules/aegir/src/config/tsconfig.aegir.json",
+  "compilerOptions": {
+    "outDir": "dist"
+  },
+  "include": [
+    "src",
+    "test"
+  ]
+}