diff --git a/src/Aiursoft.ChessServer/Aiursoft.ChessServer.csproj b/src/Aiursoft.ChessServer/Aiursoft.ChessServer.csproj
index 374d0ee..59548e3 100644
--- a/src/Aiursoft.ChessServer/Aiursoft.ChessServer.csproj
+++ b/src/Aiursoft.ChessServer/Aiursoft.ChessServer.csproj
@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Aiursoft.AiurObserver.Extensions" Version="9.0.0" />
-    <PackageReference Include="Aiursoft.AiurObserver.WebSocket.Server" Version="9.0.3" />
+    <PackageReference Include="Aiursoft.AiurObserver.WebSocket.Server" Version="9.0.4" />
     <PackageReference Include="Aiursoft.InMemoryKvDb" Version="9.0.4" />
     <PackageReference Include="Aiursoft.Scanner" Version="9.0.5" />
     <PackageReference Include="Aiursoft.WebTools" Version="9.0.3" />