diff --git a/types/connect-redis/connect-redis-tests.ts b/types/connect-redis/connect-redis-tests.ts
index a312ffd3ca..603b226dcc 100644
--- a/types/connect-redis/connect-redis-tests.ts
+++ b/types/connect-redis/connect-redis-tests.ts
@@ -6,5 +6,8 @@ const store = new RedisStore({
     host: 'localhost',
     port: 6379,
     logErrors: error => console.warn(error),
-    scanCount: 80,
+	scanCount: 80,
+	ttl: (store, sess, sessionID) => {
+		return 60;
+	}
 });
diff --git a/types/connect-redis/index.d.ts b/types/connect-redis/index.d.ts
index c5a26de73a..9b56777ac3 100644
--- a/types/connect-redis/index.d.ts
+++ b/types/connect-redis/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for connect-redis
 // Project: https://npmjs.com/package/connect-redis
 // Definitions by: Xavier Stouder <https://github.com/xstoudi>
+//				   Seth Butler <https://github.com/sbutler2901>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
@@ -26,7 +27,7 @@ declare module "connect-redis" {
             port?: number;
             socket?: string;
             url?: string;
-            ttl?: number;
+            ttl?: number | string | ((store: RedisStore, sess: Express.SessionData, sid: string) => number);
             disableTTL?: boolean;
             db?: number;
             pass?: string;