diff --git a/src/App.h b/src/App.h
index 7c3dd18..53bcbd4 100644
--- a/src/App.h
+++ b/src/App.h
@@ -148,6 +148,8 @@ public:
         bool resetIdleTimeoutOnSend = false;
         /* A good default, esp. for newcomers */
         bool sendPingsAutomatically = true;
+        /* Maximum socket lifetime in seconds before forced closure (defaults to disabled) */
+        unsigned short maxLifetime = 0;
         MoveOnlyFunction<void(HttpResponse<SSL> *, HttpRequest *, struct us_socket_context_t *)> upgrade = nullptr;
         MoveOnlyFunction<void(uWS::WebSocket<SSL, true> *)> open = nullptr;
         MoveOnlyFunction<void(uWS::WebSocket<SSL, true> *, std::string_view, uWS::OpCode)> message = nullptr;