diff --git a/src/demo8/demo8.csproj b/src/demo8/demo8.csproj
index 50eb247..3f07ff9 100644
--- a/src/demo8/demo8.csproj
+++ b/src/demo8/demo8.csproj
@@ -10,6 +10,6 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.MessagePack" Version="1.1.0" />
+    <PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.MessagePack" Version="1.1.5" />
   </ItemGroup>
 </Project>