diff --git a/greeter-server/GreeterServer.csproj b/greeter-server/GreeterServer.csproj
index 2d56b7f..27ee02b 100644
--- a/greeter-server/GreeterServer.csproj
+++ b/greeter-server/GreeterServer.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.7.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc" Version="1.20.1" />
     <PackageReference Include="Grpc.Tools" Version="1.20.1" />
     <PackageReference Include="JWT" Version="5.1.1" />