diff --git a/types/yallist/index.d.ts b/types/yallist/index.d.ts
new file mode 100644
index 0000000000..8a89697d82
--- /dev/null
+++ b/types/yallist/index.d.ts
@@ -0,0 +1,63 @@
+// Type definitions for yallist 3.0
+// Project: https://github.com/isaacs/yallist#readme
+// Definitions by: BendingBender <https://github.com/BendingBender>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+export = Yallist;
+
+declare class Yallist<T> implements Iterable<T> {
+    static create<T>(): Yallist<T>;
+    static create<T>(list: Yallist.ForEachIterable<T>): Yallist<T>;
+    static create<T>(...items: T[]): Yallist<T>;
+
+    static Node: Yallist.NodeConstructor;
+
+    head: Yallist.Node<T> | null;
+    tail: Yallist.Node<T> | null;
+    length: number;
+
+    constructor();
+    constructor(list: Yallist.ForEachIterable<T>);
+    constructor(...items: T[]);
+
+    forEach<U = this>(callbackFn: (this: U, value: T, index: number, list: this) => void, thisArg?: U): void;
+    forEachReverse<U = this>(callbackFn: (this: U, value: T, index: number, list: this) => void, thisArg?: U): void;
+    get(n: number): T | undefined;
+    getReverse(n: number): T | undefined;
+    map<U = this, R = T>(callbackFn: (this: U, value: T, list: this) => R, thisArg?: U): Yallist<R>;
+    mapReverse<U = this, R = T>(callbackFn: (this: U, value: T, list: this) => R, thisArg?: U): Yallist<R>;
+    pop(): T | undefined;
+    push(...items: T[]): number;
+    pushNode(node: Yallist.Node<T>): void;
+    reduce<U = T>(fn: (previousValue: U, currentValue: T, index: number) => U, initialValue?: U): U;
+    reduceReverse<U = T>(fn: (previousValue: U, currentValue: T, index: number) => U, initialValue?: U): U;
+    removeNode(node: Yallist.Node<T>): void;
+    reverse(): this;
+    shift(): T | undefined;
+    slice(from?: number, to?: number): Yallist<T>;
+    sliceReverse(from?: number, to?: number): Yallist<T>;
+    toArray(): T[];
+    toArrayReverse(): T[];
+    unshift(...items: T[]): number;
+    unshiftNode(node: Yallist.Node<T>): void;
+
+    [Symbol.iterator](): Iterator<T>;
+}
+
+declare namespace Yallist {
+    interface ForEachIterable<T> {
+        forEach(callbackFn: (item: T) => void): void;
+    }
+
+    interface NodeConstructor {
+        <T>(value: T, prev?: Node<T>, next?: Node<T>, list?: Yallist<T>): Node<T>;
+        new <T>(value: T, prev?: Node<T>, next?: Node<T>, list?: Yallist<T>): Node<T>;
+    }
+
+    interface Node<T> {
+        prev: Node<T> | null;
+        next: Node<T> | null;
+        list?: Yallist<T>;
+    }
+}
diff --git a/types/yallist/tsconfig.json b/types/yallist/tsconfig.json
new file mode 100644
index 0000000000..17b02a13c4
--- /dev/null
+++ b/types/yallist/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "yallist-tests.ts"
+    ]
+}
diff --git a/types/yallist/tslint.json b/types/yallist/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/yallist/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }
diff --git a/types/yallist/yallist-tests.ts b/types/yallist/yallist-tests.ts
new file mode 100644
index 0000000000..69099c0da9
--- /dev/null
+++ b/types/yallist/yallist-tests.ts
@@ -0,0 +1,117 @@
+import Yallist = require('yallist');
+
+const forEachIterable = {
+    forEach(fn: (item: string, idx: number) => void, thisArg?: any) {},
+};
+const thisArg: {someProp?: number} = {};
+const node = new Yallist.Node('foo');
+
+Yallist.create<string | number>([1, 2, 3]); // $ExpectType Yallist<string | number>
+Yallist.create<string | number>(1, 2, 3); // $ExpectType Yallist<string | number>
+const myList = Yallist.create(forEachIterable);
+myList; // $ExpectType Yallist<string>
+
+new Yallist<string | number>([1, 2, 3]); // $ExpectType Yallist<string | number>
+new Yallist<string | number>(1, 2, 3); // $ExpectType Yallist<string | number>
+new Yallist(forEachIterable); // $ExpectType Yallist<string>
+
+myList.forEach(function(v, i, l) {
+    v; // $ExpectType string
+    i; // $ExpectType number
+    l; // $ExpectType Yallist<string>
+    this; // $ExpectType Yallist<string>
+});
+myList.forEach(function(v, i, l) {
+    this; // $ExpectType { someProp?: number | undefined; }
+}, thisArg);
+myList.forEachReverse(function(v, i, l) {
+    v; // $ExpectType string
+    i; // $ExpectType number
+    l; // $ExpectType Yallist<string>
+    this; // $ExpectType Yallist<string>
+});
+myList.forEachReverse(function(v, i, l) {
+    this; // $ExpectType { someProp?: number | undefined; }
+}, thisArg);
+
+myList.get(2); // $ExpectType string | undefined
+myList.getReverse(2); // $ExpectType string | undefined
+
+myList.map(function(v, l) {
+    v; // $ExpectType string
+    l; // $ExpectType Yallist<string>
+    this; // $ExpectType Yallist<string>
+});
+myList.map(function(v, l) {
+    this; // $ExpectType { someProp?: number | undefined; }
+}, thisArg);
+myList.mapReverse(function(v, l) {
+    v; // $ExpectType string
+    l; // $ExpectType Yallist<string>
+    this; // $ExpectType Yallist<string>
+});
+myList.mapReverse(function(v, l) {
+    this; // $ExpectType { someProp?: number | undefined; }
+}, thisArg);
+
+myList.pop(); // $ExpectType string | undefined
+
+myList.push(); // $ExpectType number
+myList.push('foo'); // $ExpectType number
+myList.push('foo', 'bar'); // $ExpectType number
+
+myList.reduce((acc, v, i) => { // $ExpectType string
+    acc; // $ExpectType string
+    v; // $ExpectType string
+    i; // $ExpectType number
+    return acc;
+});
+myList.reduce((acc, v) => { // $ExpectType boolean
+    acc; // $ExpectType boolean
+    return acc;
+}, true);
+myList.reduceReverse((acc, v, i) => { // $ExpectType string
+    acc; // $ExpectType string
+    v; // $ExpectType string
+    i; // $ExpectType number
+    return acc;
+});
+myList.reduceReverse((acc, v) => { // $ExpectType boolean
+    acc; // $ExpectType boolean
+    return acc;
+}, true);
+
+myList.reverse(); // $ExpectType Yallist<string>
+
+myList.shift(); // $ExpectType string | undefined
+
+myList.slice(); // $ExpectType Yallist<string>
+myList.slice(0); // $ExpectType Yallist<string>
+myList.slice(1, -2); // $ExpectType Yallist<string>
+myList.sliceReverse(); // $ExpectType Yallist<string>
+myList.sliceReverse(0); // $ExpectType Yallist<string>
+myList.sliceReverse(1, -2); // $ExpectType Yallist<string>
+
+myList.toArray(); // $ExpectType string[]
+myList.toArrayReverse(); // $ExpectType string[]
+
+myList.unshift('bar'); // $ExpectType number
+myList.unshift('bar', 'baz'); // $ExpectType number
+
+myList.pushNode(myList.head || node);
+myList.removeNode(myList.tail || node);
+myList.unshiftNode(myList.tail || node);
+
+Yallist.Node('foo'); // $ExpectType Node<string>
+Yallist.Node('foo', node);
+Yallist.Node('foo', node, node);
+Yallist.Node('foo', node, node, myList);
+
+new Yallist.Node('foo'); // $ExpectType Node<string>
+new Yallist.Node('foo', node);
+new Yallist.Node('foo', node, node);
+new Yallist.Node('foo', node, node, myList);
+
+node.list; // $ExpectType Yallist<string> | undefined
+node.next; // $ExpectType Node<string> | null
+node.prev; // $ExpectType Node<string> | null