diff --git a/StudyProject/gRPCClientDemo/gRPCClientDemo.csproj b/StudyProject/gRPCClientDemo/gRPCClientDemo.csproj
index b9806ce..75ae745 100644
--- a/StudyProject/gRPCClientDemo/gRPCClientDemo.csproj
+++ b/StudyProject/gRPCClientDemo/gRPCClientDemo.csproj
@@ -10,7 +10,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.13.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.31.0" />
     <PackageReference Include="Grpc.Tools" Version="2.32.0">
       <PrivateAssets>all</PrivateAssets>