diff --git a/src/contentScripts/activityMap/app/style.less b/src/contentScripts/activityMap/app/style.less
index c37fc04..c827ef0 100644
--- a/src/contentScripts/activityMap/app/style.less
+++ b/src/contentScripts/activityMap/app/style.less
@@ -40,7 +40,7 @@
 
 .preview {
   width: 100%;
-  opacity: 30%;
+  opacity: 0.3;
   filter: blur(2px);
 }