diff --git a/src/NuGet.config b/src/NuGet.config
index 409e7f6..75710c5 100644
--- a/src/NuGet.config
+++ b/src/NuGet.config
@@ -2,8 +2,10 @@
 <configuration>
   <packageSources>
     <clear />
-    <!-- Nexus as single source (proxies nuget.org + hosts FourSat packages) -->
+    <!-- Nexus (hosts FourSat packages + caches nuget.org) -->
     <add key="Nexus" value="http://194.5.195.53:32081/repository/nuget-all/index.json" allowInsecureConnections="true" />
+    <!-- nuget.org as fallback -->
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
   <packageSourceCredentials>
     <Nexus>