diff --git a/docker/frontend/nginx.conf b/docker/frontend/nginx.conf
index 38f4699e7..ffe913738 100644
--- a/docker/frontend/nginx.conf
+++ b/docker/frontend/nginx.conf
@@ -6,6 +6,11 @@ http {
     include /etc/nginx/mime.types;
     default_type application/octet-stream;
 
+    # Add .mjs MIME type mapping
+    types {
+        text/javascript mjs;
+    }
+
     # Gzip compression
     gzip on;
     gzip_vary on;