diff --git a/nixos/modules/services/web-apps/nextcloud.nix b/nixos/modules/services/web-apps/nextcloud.nix
index 2a3db4cd13f9..a833f38eb851 100644
--- a/nixos/modules/services/web-apps/nextcloud.nix
+++ b/nixos/modules/services/web-apps/nextcloud.nix
@@ -1135,6 +1135,9 @@ in {
             try_files $uri /index.php$request_uri;
             expires 6M;
             access_log off;
+            location ~ \.mjs$ {
+              default_type text/javascript;
+            }
             location ~ \.wasm$ {
               default_type application/wasm;
             }