diff --git a/public/js/drawio/viewer.html b/public/js/drawio/viewer.html
index 7f20f76a..6f0e9909 100644
--- a/public/js/drawio/viewer.html
+++ b/public/js/drawio/viewer.html
@@ -13,7 +13,9 @@
left: 0;
right: 0;
top: 0;
- bottom: 0
+ bottom: 0;
+ overflow: hidden;
+ background: #ffffff;
}