diff --git a/daemon/face/websocket-factory.hpp b/daemon/face/websocket-factory.hpp
index a4b6a46..721a1eb 100644
--- a/daemon/face/websocket-factory.hpp
+++ b/daemon/face/websocket-factory.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Regents of the University of California,
+ * Copyright (c) 2014-2021,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -34,7 +34,7 @@
 
 /** \brief Protocol factory for WebSocket
  */
-class WebSocketFactory : public ProtocolFactory
+class WebSocketFactory final : public ProtocolFactory
 {
 public:
   static const std::string&
@@ -62,10 +62,10 @@
    */
   void
   doProcessConfig(OptionalConfigSection configSection,
-                  FaceSystem::ConfigContext& context) override;
+                  FaceSystem::ConfigContext& context) final;
 
   std::vector<shared_ptr<const Channel>>
-  doGetChannels() const override;
+  doGetChannels() const final;
 
 private:
   std::map<websocket::Endpoint, shared_ptr<WebSocketChannel>> m_channels;