diff --git a/modules/nixos-wiki/default.nix b/modules/nixos-wiki/default.nix
index 3d49874..5206f6c 100644
--- a/modules/nixos-wiki/default.nix
+++ b/modules/nixos-wiki/default.nix
@@ -169,6 +169,13 @@ in
 
         # Block spam by regex
         $wgSpamRegex = ["/seo (software|tools)|pornstars|casino|gambling|viagra/i"];
+        
+        # Configure ExternalData for querying websites
+        # Querying outside of specified sources only enabled if legacy mode is enabled
+        $wgExternalDataSources["nixpkgs"] = [
+          'url' => 'https://raw.githubusercontent.com/NixOS/nixpkgs/$branch$/$filepath$',
+          'params' => [ 'branch' 'filepath' ]
+        ];
       '';
     };
 
diff --git a/modules/nixos-wiki/extensions.json b/modules/nixos-wiki/extensions.json
index a9a9720..cf3623a 100644
--- a/modules/nixos-wiki/extensions.json
+++ b/modules/nixos-wiki/extensions.json
@@ -3,5 +3,6 @@
   "DarkMode": {},
   "QuickInstantCommons": {},
   "Translate": {},
-  "UniversalLanguageSelector": {}
+  "UniversalLanguageSelector": {},
+  "ExternalData": {}
 }