diff --git a/Directory.Packages.props b/Directory.Packages.props
index 02d17792..3d59b0d3 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -48,7 +48,7 @@
     <PackageVersion Include="System.ComponentModel.Annotations" Version="5.0.0" />
   </ItemGroup>
   <ItemGroup>
-    <PackageVersion Include="Google.Protobuf" Version="3.33.5" />
+    <PackageVersion Include="Google.Protobuf" Version="3.34.1" />
     <PackageVersion Include="Grpc.Core" Version="2.46.6" />
     <PackageVersion Include="Grpc.Net.Client" Version="2.76.0" />
     <PackageVersion Include="Grpc.Tools" Version="2.78.0" />
diff --git a/samples/AzureFunctionsUnitTests/AzureFunctionsApp.Tests.csproj b/samples/AzureFunctionsUnitTests/AzureFunctionsApp.Tests.csproj
index e1e548ad..ee9035ce 100644
--- a/samples/AzureFunctionsUnitTests/AzureFunctionsApp.Tests.csproj
+++ b/samples/AzureFunctionsUnitTests/AzureFunctionsApp.Tests.csproj
@@ -11,6 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.collector" />
+    <PackageReference Include="Google.Protobuf" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
     <PackageReference Include="xunit" />
     <PackageReference Include="xunit.runner.visualstudio" />