diff --git a/CSS/chapters-on-player.css b/CSS/chapters-on-player.css
index 8b8230d..f695362 100644
--- a/CSS/chapters-on-player.css
+++ b/CSS/chapters-on-player.css
@@ -12,7 +12,7 @@
 
 .sliderMarker.watched {
     background-color: red !important; /* Initially invisible */
-    /* transition: background-color 0.3s ease !important; Smooth transition */
+    transition: background-color 0.3s ease !important;
     z-index: 10 !important; /* Higher z-index to be on top */
 }