diff --git a/static/widget.html b/static/widget.html
index 4f77efe..312a4aa 100644
--- a/static/widget.html
+++ b/static/widget.html
@@ -88,6 +88,7 @@
     border-radius:8px;
     background:lightgrey;
     position:relative;
+    overflow:hidden;
 }
 .contented-progress-element {
     position:absolute;