diff --git a/dotnet/Directory.Packages.props b/dotnet/Directory.Packages.props
index 3d30f24e6e..e94e2a12fd 100644
--- a/dotnet/Directory.Packages.props
+++ b/dotnet/Directory.Packages.props
@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- Aspire.* -->
-    <PackageVersion Include="Anthropic" Version="12.20.0" />
+    <PackageVersion Include="Anthropic" Version="12.31.0" />
     <PackageVersion Include="Anthropic.Foundry" Version="0.6.0" />
     <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 9836ac8fcf..b4125ccc01 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
@@ -443,6 +443,7 @@ public TestAnthropicChatClient()
         public string? ApiKey { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
         public string? AuthToken { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
         public string? WebhookKey { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
+        public IReadOnlyList<DelegatingHandler> Handlers { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
 
         public IAnthropicClientWithRawResponse WithRawResponse => throw new NotImplementedException();
 
@@ -490,6 +491,10 @@ public TestBetaService(IAnthropicClient client)
 
             public global::Anthropic.Services.Beta.ISessionService Sessions => throw new NotImplementedException();
 
+            public global::Anthropic.Services.Beta.IDeploymentService Deployments => throw new NotImplementedException();
+
+            public global::Anthropic.Services.Beta.IDeploymentRunService DeploymentRuns => throw new NotImplementedException();
+
             public global::Anthropic.Services.Beta.IVaultService Vaults => throw new NotImplementedException();
 
             public global::Anthropic.Services.Beta.IMemoryStoreService MemoryStores => throw new NotImplementedException();
diff --git a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
index 2bff68a5c7..d3cbc90d0b 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
@@ -73,6 +73,7 @@ public TestAnthropicChatClient()
         public string? ApiKey { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
         public string? AuthToken { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
         public string? WebhookKey { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
+        public IReadOnlyList<DelegatingHandler> Handlers { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
 
         public IAnthropicClientWithRawResponse WithRawResponse => throw new NotImplementedException();