diff --git a/src/TronDotNet.Protocol/TronDotNet.Protocol.csproj b/src/TronDotNet.Protocol/TronDotNet.Protocol.csproj
index 9143560..7fde676 100644
--- a/src/TronDotNet.Protocol/TronDotNet.Protocol.csproj
+++ b/src/TronDotNet.Protocol/TronDotNet.Protocol.csproj
@@ -39,7 +39,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Google.Api.CommonProtos" Version="1.7.0" />
-		<PackageReference Include="Google.Protobuf" Version="3.13.0" />
+		<PackageReference Include="Google.Protobuf" Version="3.15.0" />
 		<PackageReference Include="Google.Protobuf.Tools" Version="3.11.2" />
 		<PackageReference Include="Grpc" Version="2.26.0" />
 		<PackageReference Include="Grpc.Net.ClientFactory" Version="2.32.0" />