diff --git a/V2RayProto/V2RayProto.csproj b/V2RayProto/V2RayProto.csproj
index 8338b0a..f10de24 100644
--- a/V2RayProto/V2RayProto.csproj
+++ b/V2RayProto/V2RayProto.csproj
@@ -9,6 +9,6 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Grpc" Version="2.27.0" />
-    <PackageReference Include="Google.Protobuf" Version="3.11.4" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
   </ItemGroup>
 </Project>
\ No newline at end of file