diff --git a/dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj b/dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj
index 1244b81542..ef73c58032 100644
--- a/dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj
+++ b/dotnet/samples/HostedAgents/AgentWithHostedMCP/AgentWithHostedMCP.csproj
@@ -39,7 +39,7 @@
     <PackageReference Include="Azure.AI.AgentServer.AgentFramework" Version="1.0.0-beta.5" />
     <PackageReference Include="Azure.AI.OpenAI" Version="2.7.0-beta.2" />
     <PackageReference Include="Azure.Identity" Version="1.17.1" />
-    <PackageReference Include="Microsoft.Agents.AI.OpenAI" Version="1.0.0-preview.251219.1" />
+    <PackageReference Include="Microsoft.Agents.AI.OpenAI" Version="1.0.0-preview.260108.1" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="10.1.1-preview.1.25612.2" />
   </ItemGroup>
 
diff --git a/dotnet/samples/HostedAgents/AgentWithTextSearchRag/AgentWithTextSearchRag.csproj b/dotnet/samples/HostedAgents/AgentWithTextSearchRag/AgentWithTextSearchRag.csproj
index 03ffaf1824..a11ab84991 100644
--- a/dotnet/samples/HostedAgents/AgentWithTextSearchRag/AgentWithTextSearchRag.csproj
+++ b/dotnet/samples/HostedAgents/AgentWithTextSearchRag/AgentWithTextSearchRag.csproj
@@ -38,7 +38,7 @@
     <PackageReference Include="Azure.AI.AgentServer.AgentFramework" Version="1.0.0-beta.5" />
     <PackageReference Include="Azure.AI.OpenAI" Version="2.7.0-beta.2" />
     <PackageReference Include="Azure.Identity" Version="1.17.1" />
-    <PackageReference Include="Microsoft.Agents.AI.OpenAI" Version="1.0.0-preview.251219.1" />
+    <PackageReference Include="Microsoft.Agents.AI.OpenAI" Version="1.0.0-preview.260108.1" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="10.1.1-preview.1.25612.2" />
   </ItemGroup>