diff --git a/dotnet/Directory.Packages.props b/dotnet/Directory.Packages.props
index 47b234fe8a6..c9346739261 100644
--- a/dotnet/Directory.Packages.props
+++ b/dotnet/Directory.Packages.props
@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- Aspire.* -->
-    <PackageVersion Include="Anthropic" Version="12.42.0" />
+    <PackageVersion Include="Anthropic" Version="12.43.0" />
     <PackageVersion Include="Anthropic.Foundry" Version="0.7.1" />
     <PackageVersion Include="Aspire.Hosting" Version="$(AspireAppHostSdkVersion)" />
     <PackageVersion Include="Aspire.Azure.AI.OpenAI" Version="13.0.0-preview.1.25560.3" />
diff --git a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
index 6ff7b3cd8d5..45d027fc261 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
@@ -511,6 +511,8 @@ public TestBetaService(IAnthropicClient client)
 
             public global::Anthropic.Services.Beta.ITunnelService Tunnels => throw new NotImplementedException();
 
+            public global::Anthropic.Services.Beta.IOrganizationService Organization => throw new NotImplementedException();
+
             public IBetaService WithOptions(Func<ClientOptions, ClientOptions> modifier)
             {
                 throw new NotImplementedException();