diff --git a/include/nodejs/node_osrm.hpp b/include/nodejs/node_osrm.hpp
index 513bd3704..f85fb5362 100644
--- a/include/nodejs/node_osrm.hpp
+++ b/include/nodejs/node_osrm.hpp
@@ -10,7 +10,7 @@
 namespace node_osrm
 {
 
-class Engine : public Napi::ObjectWrap<Engine>
+class Engine final : public Napi::ObjectWrap<Engine>
 {
   public:
     static Napi::Object Init(Napi::Env env, Napi::Object exports);