diff --git a/src/pyj/modals.pyj b/src/pyj/modals.pyj
index 8753345083..ca7b4b7fbd 100644
--- a/src/pyj/modals.pyj
+++ b/src/pyj/modals.pyj
@@ -139,6 +139,7 @@ class ModalContainer:
 
     def onkeydown(self, event):
         if (event.key is 'Escape' or event.key is 'Esc') and not event.altKey and not event.ctrlKey and not event.metaKey and not event.shiftKey:
+            event.preventDefault(), event.stopPropagation()
             self.close_current_modal(event)