diff --git a/dotnet/Directory.Packages.props b/dotnet/Directory.Packages.props
index 32cee9751f..fb5826dbf0 100644
--- a/dotnet/Directory.Packages.props
+++ b/dotnet/Directory.Packages.props
@@ -88,7 +88,7 @@
     <!-- MCP -->
     <PackageVersion Include="ModelContextProtocol" Version="0.4.0-preview.1" />
     <!-- Inference SDKs -->
-    <PackageVersion Include="Anthropic.SDK" Version="5.5.2" />
+    <PackageVersion Include="Anthropic.SDK" Version="5.5.3" />
     <PackageVersion Include="AWSSDK.Extensions.Bedrock.MEAI" Version="4.0.3.2" />
     <PackageVersion Include="Microsoft.ML.OnnxRuntimeGenAI" Version="0.9.2" />
     <PackageVersion Include="OllamaSharp" Version="5.4.7" />