diff --git a/nuget.config b/nuget.config
index 63a200340..f3853aee6 100644
--- a/nuget.config
+++ b/nuget.config
@@ -10,7 +10,7 @@
         <add key="automatic" value="True" />
     </packageRestore>
     <packageSources>
-        <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+        <clear/>
         <add key="ORT-Nightly" value="https://aiinfra.pkgs.visualstudio.com/PublicPackages/_packaging/ORT-Nightly/nuget/v3/index.json" />
     </packageSources>
 </configuration>
\ No newline at end of file