diff --git a/types/base64-async/base64-async-tests.ts b/types/base64-async/base64-async-tests.ts
new file mode 100644
index 0000000000..7efe30b89f
--- /dev/null
+++ b/types/base64-async/base64-async-tests.ts
@@ -0,0 +1,24 @@
+import b64 = require('base64-async');
+import * as fs from 'fs';
+
+const buffer: Buffer = fs.readFileSync('somehugefile.jpg');
+const b64String = 'aGkgbXVt...';
+
+b64.encode(buffer).then(b64String => {
+    b64String; // $ExpectType string
+});
+b64.encode(buffer, { chunkSize: 10 }).then(b64String => {
+    b64String; // $ExpectType string
+});
+
+b64.decode(b64String).then(buffer => {
+    buffer; // $ExpectType Buffer
+});
+b64.decode(b64String, { chunkSize: 10 }).then(buffer => {
+    buffer; // $ExpectType Buffer
+});
+
+b64(buffer); // $ExpectType Promise<string>
+b64(buffer, { chunkSize: 10 }); // $ExpectType Promise<string>
+b64(b64String); // $ExpectType Promise<Buffer>
+b64(b64String, { chunkSize: 10 }); // $ExpectType Promise<Buffer>
diff --git a/types/base64-async/index.d.ts b/types/base64-async/index.d.ts
new file mode 100644
index 0000000000..d14125a3ca
--- /dev/null
+++ b/types/base64-async/index.d.ts
@@ -0,0 +1,20 @@
+// Type definitions for base64-async 2.1
+// Project: https://github.com/lukechilds/base64-async
+// Definitions by: BendingBender <https://github.com/BendingBender>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+export = base64Async;
+
+declare function base64Async(input: Buffer, options?: base64Async.Options): Promise<string>;
+declare function base64Async(input: string, options?: base64Async.Options): Promise<Buffer>;
+
+declare namespace base64Async {
+    function encode(input: Buffer, options?: Options): Promise<string>;
+    function decode(input: string, options?: Options): Promise<Buffer>;
+
+    interface Options {
+        chunkSize?: number;
+    }
+}
diff --git a/types/base64-async/tsconfig.json b/types/base64-async/tsconfig.json
new file mode 100644
index 0000000000..38a35f20b8
--- /dev/null
+++ b/types/base64-async/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "base64-async-tests.ts"
+    ]
+}
diff --git a/types/base64-async/tslint.json b/types/base64-async/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/base64-async/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }