diff --git a/Directory.Packages.props b/Directory.Packages.props
index b3e94cc..a442891 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -95,7 +95,7 @@
     <!-- Roslyn (for qyl.analyzers) -->
     <!-- Microsoft.Agents.AI (preview) -->
     <PackageVersion Include="Microsoft.Agents.AI" Version="1.0.0-preview.251204.1" />
-    <PackageVersion Include="Microsoft.Agents.AI.Abstractions" Version="1.0.0-preview.251204.1" />
+    <PackageVersion Include="Microsoft.Agents.AI.Abstractions" Version="1.0.0-preview.260121.1" />
     <PackageVersion Include="Microsoft.Agents.AI.Hosting" Version="1.0.0-preview.251204.1" />
     <PackageVersion Include="Microsoft.Agents.AI.A2A" Version="1.0.0-preview.251204.1" />
     <PackageVersion Include="Microsoft.Agents.AI.Hosting.A2A" Version="1.0.0-preview.251204.1" />