diff --git a/Directory.Packages.props b/Directory.Packages.props
index e6ec7f1b0..c58b28d0c 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 e1e548adc..314d074c7 100644
--- a/samples/AzureFunctionsUnitTests/AzureFunctionsApp.Tests.csproj
+++ b/samples/AzureFunctionsUnitTests/AzureFunctionsApp.Tests.csproj
@@ -22,6 +22,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Google.Protobuf" />
     <Using Include="Xunit" />
   </ItemGroup>
 
diff --git a/src/ScheduledTasks/ScheduledTasks.csproj b/src/ScheduledTasks/ScheduledTasks.csproj
index 3126851ba..a52be606f 100644
--- a/src/ScheduledTasks/ScheduledTasks.csproj
+++ b/src/ScheduledTasks/ScheduledTasks.csproj
@@ -15,6 +15,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Google.Protobuf" />
     <SharedSection Include="Core" />
   </ItemGroup>
 
diff --git a/src/Worker/AzureManaged/Worker.AzureManaged.csproj b/src/Worker/AzureManaged/Worker.AzureManaged.csproj
index e433b1929..2b581b533 100644
--- a/src/Worker/AzureManaged/Worker.AzureManaged.csproj
+++ b/src/Worker/AzureManaged/Worker.AzureManaged.csproj
@@ -17,6 +17,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Google.Protobuf" />
     <SharedSection Include="AzureManaged" />
     <SharedSection Include="Core" />
   </ItemGroup>