diff --git a/src/Grpc.AspNetCore.Server.Reflection/Grpc.AspNetCore.Server.Reflection.csproj b/src/Grpc.AspNetCore.Server.Reflection/Grpc.AspNetCore.Server.Reflection.csproj
index ffe005c..47e3ef8 100644
--- a/src/Grpc.AspNetCore.Server.Reflection/Grpc.AspNetCore.Server.Reflection.csproj
+++ b/src/Grpc.AspNetCore.Server.Reflection/Grpc.AspNetCore.Server.Reflection.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.10.0-rc1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.AspNetCore.Server" Version="2.23.2" />
     <PackageReference Include="Grpc.Reflection" Version="2.24.0" />
     <PackageReference Include="Microsoft.AspNetCore.Routing" Version="2.2.2" />
diff --git a/src/XUnitTest_GrpcGreeterService/XUnitTest_GrpcGreeterService.csproj b/src/XUnitTest_GrpcGreeterService/XUnitTest_GrpcGreeterService.csproj
index 2086a1d..3b1e4cf 100644
--- a/src/XUnitTest_GrpcGreeterService/XUnitTest_GrpcGreeterService.csproj
+++ b/src/XUnitTest_GrpcGreeterService/XUnitTest_GrpcGreeterService.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.10.0-rc1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.23.2" />
     <PackageReference Include="Grpc.Tools" Version="2.24.0" PrivateAssets="All" />
     <PackageReference Include="FluentAssertions" Version="5.9.0" />