diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index ce1019e181..e887765002 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -58,7 +58,7 @@ http {
 
     location /catalogs {
       root /dev/null;
-      if ($arg_url !~* https:\/\/kubernetes-charts\.storage\.googleapis\.com\/index\.yaml) {
+      if ($arg_url != "https://kubernetes-charts.storage.googleapis.com/index.yaml") {
         return 404;
       }