diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..093ad0c
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,58 @@
+/// <reference types="node"/>
+
+declare module "child-process-promise" {
+	import {
+		ChildProcess,
+		ExecFileOptions,
+		ExecFileOptionsWithBufferEncoding,
+		ExecFileOptionsWithStringEncoding,
+		ExecOptions,
+		ExecOptionsWithBufferEncoding,
+		ExecOptionsWithStringEncoding,
+		ForkOptions,
+		SpawnOptions,
+	} from "child_process";
+	
+	export interface ChildProcessPromise<StreamType extends string
+		|Buffer> extends Promise<ChildProcessResult<StreamType>> {
+		progress(callback: (cp: ChildProcess) => void): this;
+	}
+	
+	export interface ChildProcessResult<StreamType extends string|Buffer> {
+		childProcess: ChildProcess;
+		stdout: StreamType;
+		stderr: StreamType;
+	}
+	
+	export interface ExtendOption {
+		capture?: ('stderr'|'stdout')[];
+		successfulExitCodes?: number[];
+	}
+	
+	export interface ChildProcessError extends Error {
+		code: number;
+		childProcess: ChildProcess;
+		stdout: Buffer|string;
+		stderr: Buffer|string;
+	}
+	
+	export function spawn(command: string, args?: string[],
+		options?: SpawnOptions&ExtendOption): ChildProcessPromise<string>;
+	
+	export function exec(command: string): ChildProcessPromise<string>;
+	export function exec(command: string, options: ExecOptionsWithStringEncoding): ChildProcessPromise<string>;
+	export function exec(command: string, options: ExecOptionsWithBufferEncoding): ChildProcessPromise<Buffer>;
+	export function exec(command: string, options: ExecOptions): ChildProcessPromise<string>;
+	
+	export function execFile(file: string): ChildProcessPromise<string>;
+	export function execFile(file: string, options?: ExecFileOptionsWithStringEncoding): ChildProcessPromise<string>;
+	export function execFile(file: string, options?: ExecFileOptionsWithBufferEncoding): ChildProcessPromise<Buffer>;
+	export function execFile(file: string, options?: ExecFileOptions): ChildProcessPromise<string>;
+	export function execFile(file: string, args?: string[]): ChildProcessPromise<string>;
+	export function execFile(file: string, args?: string[], options?: ExecFileOptionsWithStringEncoding): ChildProcessPromise<string>;
+	export function execFile(file: string, args?: string[], options?: ExecFileOptionsWithBufferEncoding): ChildProcessPromise<Buffer>;
+	export function execFile(file: string, args?: string[], options?: ExecFileOptions): ChildProcessPromise<string>;
+	
+	export function fork(modulePath: string, args?: string[],
+		options?: ForkOptions&ExtendOption): ChildProcessPromise<string>;
+}
diff --git a/package.json b/package.json
index 33902d2..a9555e8 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "lib-es5",
     "Readme.md"
   ],
+  "types": "./index.d.ts",
   "scripts": {
     "lint": "eslint lib/*js test/*js",
     "test": "npm run mocha",