diff --git a/web_src/css/modules/dimmer.css b/web_src/css/modules/dimmer.css
index cea4aa3f94..84b8ef60be 100644
--- a/web_src/css/modules/dimmer.css
+++ b/web_src/css/modules/dimmer.css
@@ -13,7 +13,8 @@
   overflow-y: auto;
   justify-content: center;
   padding: 8px 0;
-  transition: opacity 1s ease;
+  animation: fadein;
+  animation-duration: .2s;
   user-select: none;
 }