diff --git a/samples/durable-functions/dotnet/PdfSummarizer/pdf-summarizer-dotnet.csproj b/samples/durable-functions/dotnet/PdfSummarizer/pdf-summarizer-dotnet.csproj
index be39c0a5..54c4da27 100644
--- a/samples/durable-functions/dotnet/PdfSummarizer/pdf-summarizer-dotnet.csproj
+++ b/samples/durable-functions/dotnet/PdfSummarizer/pdf-summarizer-dotnet.csproj
@@ -24,7 +24,7 @@
     <PackageReference Include="Azure.AI.FormRecognizer" Version="4.1.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Blobs" Version="5.0.0" />
-    <PackageReference Include="Contrib.Grpc.Core.M1" Version="2.41.0" />
+    <PackageReference Include="Contrib.Grpc.Core.M1" Version="2.46.7" />
   </ItemGroup>
   <ItemGroup>
     <None Update="host.json">