diff --git a/modules/nixos-wiki/default.nix b/modules/nixos-wiki/default.nix
index f55bb68..f8a8c73 100644
--- a/modules/nixos-wiki/default.nix
+++ b/modules/nixos-wiki/default.nix
@@ -178,6 +178,8 @@ in
         # Block spam by regex
         $wgSpamRegex = ["/seo (software|tools)|adult toys|pornstars|casino|gambling|viagra/i"];
 
+        # Allow user-defined CSS for experimentation
+        $wgAllowUserCss = true;
         # Visual Editor Settings
         $wgVisualEditorAvailableNamespaces = [
           'Help' => true,