diff --git a/dotnet/Directory.Packages.props b/dotnet/Directory.Packages.props
index 64825701f5b..636e2695abd 100644
--- a/dotnet/Directory.Packages.props
+++ b/dotnet/Directory.Packages.props
@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- Aspire.* -->
-    <PackageVersion Include="Anthropic" Version="12.35.1" />
+    <PackageVersion Include="Anthropic" Version="12.42.0" />
     <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 b4125ccc01d..6ff7b3cd8d5 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
@@ -451,6 +451,10 @@ public TestAnthropicChatClient()
 
         public IModelService Models => throw new NotImplementedException();
 
+        public IFileService Files => throw new NotImplementedException();
+
+        public ISkillService Skills => throw new NotImplementedException();
+
         public IBetaService Beta => this.BetaService;
 
         public IBetaService BetaService { get; }
@@ -503,6 +507,10 @@ public TestBetaService(IAnthropicClient client)
 
             public global::Anthropic.Services.Beta.IUserProfileService UserProfiles => throw new NotImplementedException();
 
+            public global::Anthropic.Services.Beta.IDreamService Dreams => throw new NotImplementedException();
+
+            public global::Anthropic.Services.Beta.ITunnelService Tunnels => throw new NotImplementedException();
+
             public IBetaService WithOptions(Func<ClientOptions, ClientOptions> modifier)
             {
                 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 d3cbc90d0bd..abbbe6111fa 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
@@ -81,6 +81,10 @@ public TestAnthropicChatClient()
 
         public IModelService Models => throw new NotImplementedException();
 
+        public IFileService Files => throw new NotImplementedException();
+
+        public ISkillService Skills => throw new NotImplementedException();
+
         public IBetaService Beta => throw new NotImplementedException();
 
         public IAnthropicClient WithOptions(Func<ClientOptions, ClientOptions> modifier)