diff --git a/DemoService/DemoService.csproj b/DemoService/DemoService.csproj
index 8a98389..078658f 100644
--- a/DemoService/DemoService.csproj
+++ b/DemoService/DemoService.csproj
@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Grpc.AspNetCore.Server" Version="0.1.20-pre1" />
-    <PackageReference Include="Google.Protobuf" Version="3.7.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Tools" Version="1.20.0-pre3" PrivateAssets="All" />
   </ItemGroup>