diff --git a/normalize.css b/normalize.css
index e5a4934..4c3335a 100644
--- a/normalize.css
+++ b/normalize.css
@@ -115,7 +115,7 @@ a:focus {
 
 a:hover,
 a:active {
-    outline: none;
+    outline: 0;
 }
 
 /* ............................................................................................................. General typography */