diff --git a/include/brynet/base/Timer.hpp b/include/brynet/base/Timer.hpp
index a11ab61..b12c99d 100644
--- a/include/brynet/base/Timer.hpp
+++ b/include/brynet/base/Timer.hpp
@@ -76,7 +76,7 @@ class Timer final
     friend class TimerMgr;
 };
 
-class RepeatTimer
+class RepeatTimer final
 {
 public:
     using Ptr = std::shared_ptr<RepeatTimer>;
diff --git a/include/brynet/net/TcpService.hpp b/include/brynet/net/TcpService.hpp
index fdfd3cc..83d3a35 100644
--- a/include/brynet/net/TcpService.hpp
+++ b/include/brynet/net/TcpService.hpp
@@ -12,6 +12,7 @@ class ITcpService
     using Ptr = std::shared_ptr<ITcpService>;
 
 public:
+    virtual ~ITcpService() = default;
     virtual bool addTcpConnection(TcpSocket::Ptr socket, ConnectionOption options) = 0;
 };