diff --git a/types/stale-lru-cache/index.d.ts b/types/stale-lru-cache/index.d.ts
new file mode 100644
index 0000000000..f5ab3733b3
--- /dev/null
+++ b/types/stale-lru-cache/index.d.ts
@@ -0,0 +1,43 @@
+// Type definitions for stale-lru-cache 5.1
+// Project: https://github.com/cyberthom/stale-lru-cache
+// Definitions by: Joona Heikkilä <https://github.com/cxcorp/>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare class Cache<K, V> {
+    constructor(options?: Cache.CacheOptions<K, V>);
+    delete(key: K): boolean;
+    get(key: K): V | undefined;
+    set(key: K, value: V, options?: string | Cache.SetOptions<K, V>): boolean;
+    has(key: K): boolean;
+    isStale(key: K): boolean;
+    keys(): K[];
+    reset(): void;
+    size(): number;
+    values(): V[];
+    wrap(
+        key: K,
+        revalidate: Cache.RevalidationCallback<K, V>,
+        callback: Cache.OptionsCallback<K, V>
+    ): void;
+}
+
+declare namespace Cache {
+    type OptionsCallback<K, V> = (error: any, value: V, options?: string | SetOptions<K, V>) => void;
+    type RevalidationCallback<K, V> = (key: K, callback: OptionsCallback<K, V>) => void;
+
+    interface CacheOptions<K, V> {
+        maxAge?: number;
+        staleWhileRevalidate?: number;
+        revalidate?: RevalidationCallback<K, V>;
+        maxSize?: number;
+        getSize?(value: V, key: K): number;
+    }
+
+    interface SetOptions<K, V> {
+        maxAge?: number;
+        staleWhileRevalidate?: number;
+        revalidate?: RevalidationCallback<K, V>;
+    }
+}
+
+export = Cache;
diff --git a/types/stale-lru-cache/stale-lru-cache-tests.ts b/types/stale-lru-cache/stale-lru-cache-tests.ts
new file mode 100644
index 0000000000..c1364baa83
--- /dev/null
+++ b/types/stale-lru-cache/stale-lru-cache-tests.ts
@@ -0,0 +1,44 @@
+import * as Cache from 'stale-lru-cache';
+
+const cache = new Cache<string, string>({
+    maxSize: 100,
+    maxAge: 600,
+    staleWhileRevalidate: 86400,
+    revalidate: (key, callback) => {
+        callback(null, 'Value of ' + key);
+    }
+});
+
+const success: boolean = cache.set('key', 'value'); // true
+const value: string = cache.get('key') || 'backup'; // 'value'
+const deleteSuccess: boolean = cache.delete('key');
+const has: boolean = cache.has('key');
+const isStale: boolean = cache.isStale('key');
+const keys: string[] = cache.keys();
+cache.reset();
+
+cache.set('foo', 'bar');
+
+// Get response from cache
+const revalidate = (url: string, callback: (error: any, value?: string, options?: string) => any) => {
+    request(url, (error, response, html) => {
+        if (error) return callback(error);
+        callback(null, html, response.headers['cache-control']);
+    });
+};
+
+let request: (url: string, cb: (error: any, response: any, html: string) => any) => any;
+cache.wrap('http://www.google.com', revalidate, (error, html) => {
+    // Do something with cached response
+});
+
+cache.set('key', 'value'); // true
+
+cache.set('key', 'value', { maxAge: 600, staleWhileRevalidate: 86400 }); // true
+cache.set('key', 'value', { maxAge: 0 }); // false
+
+cache.set('key', 'value', 'max-age=600, stale-while-revalidate=86400'); // true
+cache.set('key', 'value', 'no-cache, no-store, must-revalidate'); // false
+
+const size: number = cache.size();
+const values: string[] = cache.values();
diff --git a/types/stale-lru-cache/tsconfig.json b/types/stale-lru-cache/tsconfig.json
new file mode 100644
index 0000000000..ccd4edb516
--- /dev/null
+++ b/types/stale-lru-cache/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",
+        "stale-lru-cache-tests.ts"
+    ]
+}
diff --git a/types/stale-lru-cache/tslint.json b/types/stale-lru-cache/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/stale-lru-cache/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }