diff --git a/types/client-sessions/client-sessions-tests.ts b/types/client-sessions/client-sessions-tests.ts
new file mode 100644
index 0000000000..f53407a69c
--- /dev/null
+++ b/types/client-sessions/client-sessions-tests.ts
@@ -0,0 +1,25 @@
+import * as express from "express";
+import * as session from "client-sessions";
+
+const secret = "yolo";
+const app = express();
+const options = { secret };
+
+let middleware = session(options);
+middleware = session({ secret, cookieName: "_s" });
+middleware = session({ secret, duration: 600000 });
+middleware = session({ secret, activeDuration: 42 });
+middleware = session({
+  secret,
+  cookie: {
+    httpOnly: false,
+  }
+});
+
+app.use(middleware);
+app.use((req: any, res: any) => {
+  req.session = { test: true };
+});
+
+const encoded = session.util.encode(options, { test: true });
+session.util.decode(options, encoded);
diff --git a/types/client-sessions/index.d.ts b/types/client-sessions/index.d.ts
new file mode 100644
index 0000000000..6a4b3b2b2f
--- /dev/null
+++ b/types/client-sessions/index.d.ts
@@ -0,0 +1,74 @@
+// Type definitions for client-sessions 0.8
+// Project: https://github.com/mozilla/node-client-sessions
+// Definitions by: Aditya <https://github.com/netroy>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+/// <reference types="node" />
+
+import * as cookies from "cookies";
+
+declare namespace client_sessions {
+  type NextFunction = (err?: Error) => void;
+  type RequestHandler = (req: any, res: any, next: NextFunction) => any;
+
+  interface SessionOptions {
+    /**
+     * encryption secret for the session.
+     * required
+     */
+    secret: string;
+
+    /**
+     * session cookie name.
+     * Default: 'session_state'
+     */
+    cookieName?: string;
+
+    /**
+     * how long the session will stay valid in ms.
+     * Default: 24 hours
+     */
+    duration?: number;
+
+    /**
+     * if expiresIn < activeDuration, the session will be extended by activeDuration milliseconds.
+     * Default: 5 minutes
+     */
+    activeDuration?: number;
+
+    /**
+     * session accessor on the request object.
+     * Default: 'session'
+     */
+    requestKey?: string;
+
+    cookie?: cookies.IOptions;
+  }
+
+  interface DecodeResult {
+    content: any;
+    createdAt: number;
+    duration: number;
+  }
+
+  interface ComputeHmacOptions {
+    signatureAlgorithm: string;
+    signatureKey: Buffer;
+  }
+
+  interface Util {
+    computeHmac(options: any, iv: string, ciphertext: string, duration: number, createdAt: number): Buffer;
+    encode(options: SessionOptions, content: any, duration?: number, createdAt?: number): string;
+    decode(options: SessionOptions, encoded: string): DecodeResult;
+  }
+
+  interface Sessions {
+    (options: SessionOptions): RequestHandler;
+    util: Util;
+  }
+}
+
+declare var client_sessions: client_sessions.Sessions;
+export = client_sessions;
+export as namespace client_sessions;
diff --git a/types/client-sessions/tsconfig.json b/types/client-sessions/tsconfig.json
new file mode 100644
index 0000000000..151ca87623
--- /dev/null
+++ b/types/client-sessions/tsconfig.json
@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "client-sessions-tests.ts"
+    ]
+}
diff --git a/types/client-sessions/tslint.json b/types/client-sessions/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/client-sessions/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }