diff --git a/OculusMobileVoiceChat.Server/Server.csproj b/OculusMobileVoiceChat.Server/Server.csproj
index 0255401..0079c46 100644
--- a/OculusMobileVoiceChat.Server/Server.csproj
+++ b/OculusMobileVoiceChat.Server/Server.csproj
@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="MagicOnion" Version="2.1.2" />
     <PackageReference Include="MagicOnion.Hosting" Version="2.1.2" />
-    <PackageReference Include="MessagePack.UnityShims" Version="1.7.3.7" />
+    <PackageReference Include="MessagePack.UnityShims" Version="1.9.3" />
   </ItemGroup>
 
 </Project>