diff --git a/scss/bootstrap/_dropdown.scss b/scss/bootstrap/_dropdown.scss
index 10981c8..400821e 100644
--- a/scss/bootstrap/_dropdown.scss
+++ b/scss/bootstrap/_dropdown.scss
@@ -4,7 +4,7 @@
     .dropdown-menu {
       display: block;
       opacity: 0;
-      transition: all .15s linear;
+      transition: opacity .15s linear;
       pointer-events: none; // Prevent auto show when mouse is below top menu item
       min-width: 190px;
     }