diff --git a/README.md b/README.md
index 1df7a31..ce8a91e 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,4 @@ This following libraries are currently included. Where possible add the relevant
 - [peer-info](https://github.com/libp2p/js-peer-info)
 - [pull-pushable](https://github.com/pull-stream/pull-pushable)
 - [pull-stream](https://github.com/pull-stream/pull-stream)
+- [tweetnacl](https://github.com/dchest/tweetnacl-js)
diff --git a/tweetnacl/index.d.ts b/tweetnacl/index.d.ts
new file mode 100644
index 0000000..04c4f61
--- /dev/null
+++ b/tweetnacl/index.d.ts
@@ -0,0 +1,58 @@
+// Type definitions for tweetnacl 1.0.0
+// Project: https://github.com/dchest/tweetnacl-js
+// Definitions by: Jaco Greeff <https://github.com/jacogr>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node"/>
+
+type KeypairType = {
+    publicKey: Uint8Array,
+    secretKey: Uint8Array
+};
+
+type Hash = {
+    (message: Uint8Array): Uint8Array,
+
+    hashLength: number
+};
+
+type SecretBox = {
+    (message: Uint8Array, nonce: Uint8Array, secret: Uint8Array): Uint8Array,
+
+    open: (encrypted: Uint8Array, nonce: Uint8Array, secret: Uint8Array) => Uint8Array | null
+};
+
+type SignDetached = {
+    (message: Uint8Array, secretKey: Uint8Array): Uint8Array,
+
+    verify: (message: Uint8Array, signature: Uint8Array, publicKey: Uint8Array) => boolean
+};
+
+type SignKeypair = {
+    (): KeypairType,
+
+    fromSecretKey: (secretKey: Uint8Array) => KeypairType,
+    fromSeed: (seed: Uint8Array) => KeypairType,
+};
+
+type Sign = {
+    (message: Uint8Array, secretKey: Uint8Array): Uint8Array,
+    detached: SignDetached,
+
+    open: (signedMsg: Uint8Array, publicKey: Uint8Array) => Uint8Array,
+    keyPair: SignKeypair,
+
+    publicKeyLength: number,
+    secretKeyLength: number,
+    seedLength: number,
+    signatureLength: number,
+};
+
+type TweetNacl = {
+    randomBytes: (length: number) => Uint8Array,
+    hash: Hash,
+    secretbox: SecretBox,
+    sign: Sign
+};
+
+export = TweetNacl;
diff --git a/tweetnacl/tsconfig.json b/tweetnacl/tsconfig.json
new file mode 100644
index 0000000..932e246
--- /dev/null
+++ b/tweetnacl/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/tweetnacl/tslint.json b/tweetnacl/tslint.json
new file mode 100644
index 0000000..3db14f8
--- /dev/null
+++ b/tweetnacl/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }
diff --git a/tweetnacl/tweetnacl-tests.ts b/tweetnacl/tweetnacl-tests.ts
new file mode 100644
index 0000000..e69de29