diff --git a/packages/theme-chalk/src/overlay.scss b/packages/theme-chalk/src/overlay.scss
index 5e2a4ce66a..5b4f216cb3 100644
--- a/packages/theme-chalk/src/overlay.scss
+++ b/packages/theme-chalk/src/overlay.scss
@@ -13,4 +13,5 @@
   z-index: 2000;
   height: 100%;
   background-color: rgba(0, 0, 0, 0.5);
+  overflow: auto;
 }
\ No newline at end of file