diff --git a/types/koa-session/index.d.ts b/types/koa-session/index.d.ts
index d46bdc7765..bd31a897e3 100644
--- a/types/koa-session/index.d.ts
+++ b/types/koa-session/index.d.ts
@@ -44,6 +44,13 @@ declare namespace session {
          */
         signed?: boolean;
 
+        /**
+         * (boolean) Force a session identifier cookie to be set on every response
+         * The expiration is reset to the original maxAge, resetting the expiration countdown
+         * default is false
+         */
+        rolling?: boolean;
+
         /**
          * You can store the session content in external stores(redis, mongodb or other DBs)
          */