diff --git a/src/packages/overlay/overlay.scss b/src/packages/overlay/overlay.scss
index 38b634d902970bec296704c3681b048d5a5ae56e..6eaae676fd65c4ead25ced66005c03ab4a41a599 100644
--- a/src/packages/overlay/overlay.scss
+++ b/src/packages/overlay/overlay.scss
@@ -4,6 +4,8 @@
   bottom: 0;
   left: 0;
   right: 0;
+  width: 100%;
+  height: 100%;
   background-color: $overlay-bg-color;
 }
 .nut-overflow-hidden {