diff --git a/types/webpack-assets-manifest/index.d.ts b/types/webpack-assets-manifest/index.d.ts
new file mode 100644
index 0000000000..ad6d00fab3
--- /dev/null
+++ b/types/webpack-assets-manifest/index.d.ts
@@ -0,0 +1,147 @@
+// Type definitions for webpack-assets-manifest 3.0
+// Project: https://github.com/webdeveric/webpack-assets-manifest
+// Definitions by: Franklin Tse <https://github.com/FranklinWhale>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.7
+
+import { Plugin } from "webpack";
+import { SyncHook, SyncWaterfallHook } from "tapable";
+
+declare class WebpackAssetsManifest extends Plugin {
+	constructor(options?: WebpackAssetsManifest.Options);
+
+	/** https://github.com/webdeveric/webpack-assets-manifest#hooks */
+	hooks: {
+		apply: SyncHook<WebpackAssetsManifest>;
+
+		/**
+		 * The `SyncWaterfallHook` class supports 3 type parameters only but this hook actually has 4 parameters. The type of 4th parameter is `AnyObject`.
+		 *
+		 * Refer to https://github.com/webdeveric/webpack-assets-manifest#hooks for details
+		 */
+		customize: SyncWaterfallHook<WebpackAssetsManifest.Entry, WebpackAssetsManifest.AnyObject, WebpackAssetsManifest>;
+
+		transform: SyncWaterfallHook<WebpackAssetsManifest.AnyObject, WebpackAssetsManifest>;
+
+		done: SyncHook<WebpackAssetsManifest, WebpackAssetsManifest.AnyObject>;
+
+		options: SyncWaterfallHook<WebpackAssetsManifest.Options>;
+
+		afterOptions: SyncHook<WebpackAssetsManifest.Options>;
+	};
+
+	/** https://github.com/webdeveric/webpack-assets-manifest#options-read-the-schema */
+	options: WebpackAssetsManifest.Options;
+
+	/** https://github.com/webdeveric/webpack-assets-manifest#options-read-the-schema */
+	defaultOptions: WebpackAssetsManifest.Options;
+
+	/** Determine if the manifest data is currently being merged */
+	isMerging: boolean;
+
+	/** Get the file extension */
+	getExtension(filename: string): string;
+
+	/** Replace backslash with forward slash */
+	fixKey(key: string): string;
+
+	/** Determine if the filename matches the HMR filename pattern */
+	isHMR(filename: string): boolean;
+
+	/** Add item to assets without modifying the key or value */
+	setRaw(key: string, value: string): this;
+
+	/** Add an item to the manifest */
+	set(key: string, value: string): this;
+
+	/** Determine if an item exist in the manifest */
+	has(key: string): boolean;
+
+	/** Get an item from the manifest */
+	get(key: string, defaultValue?: string): any;
+
+	/** Delete an item from the manifest */
+	delete(key: string): boolean;
+
+	/** Get the file system path to the manifest */
+	getOutputPath(): string;
+
+	/** Get the public path for the filename */
+	getPublicPath(filename: string): string;
+
+	/**
+	 * Get a [Proxy](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler) for the manifest
+	 *
+	 * @param raw - Use `setRaw` instead of `set`
+	 */
+	getProxy(raw?: boolean): ProxyHandler<WebpackAssetsManifest>;
+}
+
+declare namespace WebpackAssetsManifest {
+	interface Options {
+		/** https://github.com/webdeveric/webpack-assets-manifest#assets */
+		assets?: object;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#output */
+		output?: string;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#replacer */
+		replacer?: null | ReadonlyArray<string> | ((key: string, value: string) => number | string | boolean | null | object | undefined);
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#space */
+		space?: number;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#writetodisk */
+		writeToDisk?: boolean;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#fileextregex */
+		fileExtRegex?: RegExp | null | false;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#sortmanifest */
+		sortManifest?: boolean | ((this: WebpackAssetsManifest, a: string, b: string) => number);
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#merge */
+		merge?: boolean | "customize";
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#publicpath */
+		publicPath?: string | boolean | null | (((filename: string, manifest: WebpackAssetsManifest) => string));
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#apply */
+		apply?: ((manifest: WebpackAssetsManifest) => void) | null;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#customize */
+		customize?: ((entry: Entry, original: AnyObject, manifest: WebpackAssetsManifest, asset: AnyObject) => Entry | false) | null;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#transform */
+		transform?: ((assets: AnyObject, manifest: WebpackAssetsManifest) => any) | null;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#done */
+		done?: ((manifest: WebpackAssetsManifest, stats: AnyObject) => void) | null;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#entrypoints */
+		entrypoints?: boolean;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#entrypointskey */
+		entrypointsKey?: string | false;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#integrity */
+		integrity?: boolean;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#integrityhashes */
+		integrityHashes?: ReadonlyArray<string>;
+
+		/** https://github.com/webdeveric/webpack-assets-manifest#integritypropertyname */
+		integrityPropertyName?: string;
+	}
+
+	interface Entry {
+		key: string;
+		value: string;
+	}
+
+	interface AnyObject extends Object {
+		[index: string]: any;
+	}
+}
+
+export = WebpackAssetsManifest;
diff --git a/types/webpack-assets-manifest/tsconfig.json b/types/webpack-assets-manifest/tsconfig.json
new file mode 100644
index 0000000000..624eb9f943
--- /dev/null
+++ b/types/webpack-assets-manifest/tsconfig.json
@@ -0,0 +1,24 @@
+{
+	"compilerOptions": {
+		"module": "commonjs",
+		"lib": [
+			"es6"
+		],
+		"noImplicitAny": true,
+		"noImplicitThis": true,
+		"strictNullChecks": true,
+		"strictFunctionTypes": true,
+		"esModuleInterop": true,
+		"baseUrl": "../",
+		"typeRoots": [
+			"../"
+		],
+		"types": [],
+		"noEmit": true,
+		"forceConsistentCasingInFileNames": true
+	},
+	"files": [
+		"index.d.ts",
+		"webpack-assets-manifest-tests.ts"
+	]
+}
diff --git a/types/webpack-assets-manifest/tslint.json b/types/webpack-assets-manifest/tslint.json
new file mode 100644
index 0000000000..369725d5a4
--- /dev/null
+++ b/types/webpack-assets-manifest/tslint.json
@@ -0,0 +1,10 @@
+{
+	"extends": "dtslint/dt.json",
+	"rules": {
+		"indent": [
+			true,
+			"tabs",
+			4
+		]
+	}
+}
diff --git a/types/webpack-assets-manifest/webpack-assets-manifest-tests.ts b/types/webpack-assets-manifest/webpack-assets-manifest-tests.ts
new file mode 100644
index 0000000000..551451a989
--- /dev/null
+++ b/types/webpack-assets-manifest/webpack-assets-manifest-tests.ts
@@ -0,0 +1,106 @@
+import WebpackAssetsManifest from "webpack-assets-manifest";
+
+/** https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/asset-integrity.js */
+new WebpackAssetsManifest({
+	output: 'asset-integrity-manifest.json',
+	integrity: true,
+	publicPath: true,
+	customize(entry, original, manifest, asset) {
+		return {
+			key: entry.value,
+			value: asset && asset.integrity,
+		};
+	},
+});
+
+/** https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/aws-s3-data-integrity.js */
+new WebpackAssetsManifest({
+	output: 'aws-s3-data-integrity-manifest.json',
+	integrity: true,
+	integrityHashes: ['md5'],
+	integrityPropertyName: 'md5',
+	publicPath: 's3://some-bucket/some-folder/',
+	customize(entry, original, manifest, asset) {
+		return {
+			key: entry.value,
+			value: asset && asset.md5.substr(4),
+		};
+	},
+});
+
+/** https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/custom-cdn.js */
+new WebpackAssetsManifest({
+	output: 'custom-cdn-manifest.json',
+	publicPath(filename, manifest) {
+		switch (manifest.getExtension(filename).substr(1).toLowerCase()) {
+			case 'jpg': case 'jpeg': case 'gif': case 'png': case 'svg':
+				return `https://img.cdn.example.com/${filename}`;
+			case 'css':
+				return `https://css.cdn.example.com/${filename}`;
+			case 'js':
+				return `https://js.cdn.example.com/${filename}`;
+			default:
+				return `https://cdn.example.com/${filename}`;
+		}
+	},
+});
+
+/**
+ * https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/customized.js
+ * https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/merged.js
+ */
+new WebpackAssetsManifest({
+	output: 'customized-manifest.json',
+	merge: true,
+	customize(entry, original, manifest, asset) {
+		if (manifest.isMerging) {}
+
+		if (entry.key.toLowerCase().endsWith('.map')) {
+			return false;
+		}
+
+		return {
+			key: `src/${entry.key}`,
+			value: `dist/${entry.value}`,
+		};
+	},
+});
+
+/** https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/sorted.js */
+new WebpackAssetsManifest({
+	output: 'sorted-manifest.json',
+	sortManifest(a, b) {
+		const extA = this.getExtension(a);
+		const extB = this.getExtension(b);
+
+		if (extA > extB) {
+			return 1;
+		}
+
+		if (extA < extB) {
+			return -1;
+		}
+
+		return a.localeCompare(b);
+	},
+});
+
+/** https://github.com/webdeveric/webpack-assets-manifest/blob/master/examples/transformed.js */
+new WebpackAssetsManifest({
+	output: 'transformed-manifest.json',
+	transform(assets, manifest) {
+		const { name, version } = require('./package.json');
+
+		assets.package = {
+			name,
+			version,
+		};
+
+		const { key, value } = manifest.hooks.customize.call({
+			key: 'YourKey',
+			value: 'YourValue',
+		});
+
+		assets[key] = value;
+	},
+});