diff --git a/after/syntax/css/css3-ui.vim b/after/syntax/css/css3-ui.vim
index 4611f97..8f7d2fb 100644
--- a/after/syntax/css/css3-ui.vim
+++ b/after/syntax/css/css3-ui.vim
@@ -2,6 +2,6 @@ syn keyword cssUIProp contained icon resize
 syn match cssUIProp contained "\<box-sizing\>"
 syn match cssUIProp contained "\<ime-mode\>"
 syn match cssUIProp contained "\<nav-\(index\|up\|right\|down\|left\)"
-syn match cssUIProp contained "\<outline\(-\(color\|offset\|style\|width\)\)\="
+syn match cssUIProp contained "\<outline-offset\>"
 syn match cssUIProp contained "\<text-overflow\>"
 syn keyword cssUIAttr contained active inactive disabled root horizontal vertical clip ellipsis