diff --git a/README.md b/README.md
index aad6ad0..c5eb8a9 100644
--- a/README.md
+++ b/README.md
@@ -9,5 +9,7 @@ In general, updates here should have corrsponding PRs on the DefinitelyTyped rep
 This following libraries are currently included. Where possible add the relevant DT PRs as there are included - may not be applicable initially if definitions are not expansive enough or fully tested internally.
 
 - [blakejs](https://github.com/dcposch/blakejs)
-- [bn.js](https://github.com/indutny/bn.js/) [@types PR #26717](https://github.com/DefinitelyTyped/DefinitelyTyped/pull/26717)
+- [bn.js](https://github.com/indutny/bn.js) [@types PR #26717](https://github.com/DefinitelyTyped/DefinitelyTyped/pull/26717)
 - [keccak](https://github.com/cryptocoinjs/keccak)
+- [multiaddr](https://github.com/multiformats/js-multiaddr)
+- [peer-id](https://github.com/libp2p/js-peer-id)
diff --git a/multiaddr/index.d.ts b/multiaddr/index.d.ts
new file mode 100644
index 0000000..19d76c7
--- /dev/null
+++ b/multiaddr/index.d.ts
@@ -0,0 +1,53 @@
+// Type definitions for multiaddr 5.0.0
+// Project: https://github.com/multiformats/js-multiaddr
+// Definitions by: Jaco Greeff <https://github.com/jacogr>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node"/>
+
+import PeerId from 'peer-id';
+
+type Address = {
+    family: string,
+    host: string,
+    port: string
+};
+
+type Options = Address & {
+    transport: string
+};
+
+type Proto = {
+    code: number,
+    name: string,
+    size: number
+};
+
+type Tuple = [ number, Buffer ];
+
+type TupleString = [ number, string ];
+
+declare class Multiaddr {
+    constructor (addr: Multiaddr | Buffer | string);
+
+    static isMultiaddr (addr: Multiaddr): addr is Multiaddr;
+    static isName (other: Multiaddr): boolean;
+    static fromNodeAddress (addr: { address: string, port: string }, transport: string): Multiaddr;
+
+    decapsulate (other: Multiaddr): Multiaddr;
+    encapsulate (other: Multiaddr): Multiaddr;
+    equals (other: Multiaddr): boolean;
+    getPeerId (): PeerId;
+    inspect (): string;
+    isThinWaistAddress (other?: Multiaddr): boolean;
+    nodeAddress (): Address;
+    protos (): Proto[];
+    protoCodes (): number[];
+    protoNames (): string[];
+    stringTuples (): TupleString[];
+    tuples (): Tuple[];
+    toOptions (): Options;
+    toString (): string;
+}
+
+export default Multiaddr;
diff --git a/multiaddr/multiaddr-tests.ts b/multiaddr/multiaddr-tests.ts
new file mode 100644
index 0000000..e69de29
diff --git a/multiaddr/tsconfig.json b/multiaddr/tsconfig.json
new file mode 100644
index 0000000..932e246
--- /dev/null
+++ b/multiaddr/tsconfig.json
@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": ["index.d.ts", "bn.js-tests.ts"]
+}
diff --git a/multiaddr/tslint.json b/multiaddr/tslint.json
new file mode 100644
index 0000000..3db14f8
--- /dev/null
+++ b/multiaddr/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }