diff --git a/Directory.Build.props b/Directory.Build.props
new file mode 100644
index 0000000..80f498a
--- /dev/null
+++ b/Directory.Build.props
@@ -0,0 +1,5 @@
+<Project>
+  <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+</Project>
diff --git a/src/FX.GrpcClient/FX.GrpcClient.csproj b/src/FX.GrpcClient/FX.GrpcClient.csproj
index 16f3226..7cf46c9 100644
--- a/src/FX.GrpcClient/FX.GrpcClient.csproj
+++ b/src/FX.GrpcClient/FX.GrpcClient.csproj
@@ -4,6 +4,8 @@
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <!-- CS8981 is triggered by auto-generated protobuf types -->
+    <WarningsNotAsErrors>$(WarningsNotAsErrors);CS8981</WarningsNotAsErrors>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/FX.GrpcService/FX.GrpcService.csproj b/src/FX.GrpcService/FX.GrpcService.csproj
index dc1a0b2..7b2a54c 100644
--- a/src/FX.GrpcService/FX.GrpcService.csproj
+++ b/src/FX.GrpcService/FX.GrpcService.csproj
@@ -4,6 +4,8 @@
     <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <!-- CS8981 is triggered by auto-generated protobuf types -->
+    <WarningsNotAsErrors>$(WarningsNotAsErrors);CS8981</WarningsNotAsErrors>
   </PropertyGroup>
 
   <ItemGroup>