diff --git a/css/main.css b/css/main.css
index f2793372..c7ee57da 100644
--- a/css/main.css
+++ b/css/main.css
@@ -1693,5 +1693,5 @@ button:focus {
 }
 
 .dark .sidebar-vertical-separator {
-    border-bottom: 1px solid rgba(255,255,255,0.1);
+    border-bottom: 1px solid rgb(255 255 255 / 10%);
 }