diff --git a/types/yazl/index.d.ts b/types/yazl/index.d.ts
new file mode 100644
index 0000000000..45288eaad5
--- /dev/null
+++ b/types/yazl/index.d.ts
@@ -0,0 +1,46 @@
+// Type definitions for yazl 2.4
+// Project: https://github.com/thejoshwolfe/yazl
+// Definitions by: taoqf <https://github.com/taoqf>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
+
+/// <reference types="node" />
+
+import { Readable, Writable } from 'stream';
+import { Buffer } from 'buffer';
+
+export interface Options {
+    mtime: Date;
+    mode: number;
+    compress: boolean;
+    forceZip64Format: boolean;
+}
+
+export interface ReadStreamOptions extends Options {
+    size: number;
+}
+
+export interface DirectoryOptions {
+    mtime: Date;
+    mode: number;
+}
+
+export interface EndOptions {
+    forceZip64Format: boolean;
+}
+
+export interface DosDateTime {
+    date: number;
+    time: number;
+}
+
+export class ZipFile {
+    addFile(realPath: string, metadataPath: string, options?: Partial<Options>): void;
+    outputStream: Writable;
+    addReadStream(input: Readable, metadataPath: string, options?: Partial<ReadStreamOptions>): void;
+    addBuffer(buffer: Buffer, metadataPath: string, options?: Partial<Options>): void;
+    end(optoins?: EndOptions, finalSizeCallback?: () => void): void;
+
+    addEmptyDirectory(metadataPath: string, options?: Partial<DirectoryOptions>): void;
+    dateToDosDateTime(jsDate: Date): DosDateTime;
+}
diff --git a/types/yazl/tsconfig.json b/types/yazl/tsconfig.json
new file mode 100644
index 0000000000..124a83ec4d
--- /dev/null
+++ b/types/yazl/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",
+        "yazl-tests.ts"
+    ]
+}
diff --git a/types/yazl/tslint.json b/types/yazl/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/yazl/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }
diff --git a/types/yazl/yazl-tests.ts b/types/yazl/yazl-tests.ts
new file mode 100644
index 0000000000..dfc5cd3c27
--- /dev/null
+++ b/types/yazl/yazl-tests.ts
@@ -0,0 +1,22 @@
+import { ZipFile } from "yazl";
+import fs = require('fs');
+
+const zipfile = new ZipFile();
+zipfile.addFile("file1.txt", "file1.txt");
+// (add only files, not directories)
+zipfile.addFile("path/to/file.txt", "path/in/zipfile.txt");
+// pipe() can be called any time after the constructor
+zipfile.outputStream.pipe(fs.createWriteStream("output.zip")).on("close", () => {
+	console.log("done");
+});
+// alternate apis for adding files:
+zipfile.addReadStream(process.stdin, "stdin.txt", {
+	mtime: new Date(),
+	mode: parseInt("0100664", 8), // -rw-rw-r--
+});
+zipfile.addBuffer(new Buffer("hello"), "hello.txt", {
+	mtime: new Date(),
+	mode: parseInt("0100664", 8), // -rw-rw-r--
+});
+// call end() after all the files have been added
+zipfile.end();