diff --git a/src/JT809.DotNetty.Simples/Superior/JT809.GrpcProtos/JT809.GrpcProtos.csproj b/src/JT809.DotNetty.Simples/Superior/JT809.GrpcProtos/JT809.GrpcProtos.csproj
index 35afab5..54e9413 100644
--- a/src/JT809.DotNetty.Simples/Superior/JT809.GrpcProtos/JT809.GrpcProtos.csproj
+++ b/src/JT809.DotNetty.Simples/Superior/JT809.GrpcProtos/JT809.GrpcProtos.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.12.1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
   </ItemGroup>
 
 </Project>