diff --git a/lib/css/index.css b/lib/css/index.css
index 4343256..88f940e 100644
--- a/lib/css/index.css
+++ b/lib/css/index.css
@@ -97,6 +97,7 @@ nav {
 }
 
 .nav-transparent {
+  transition: background-color 0.4s;
   background-color: transparent !important;
   box-shadow: none;
 }