diff --git a/styles/less/main.less b/styles/less/main.less
index b345e52..7aada10 100644
--- a/styles/less/main.less
+++ b/styles/less/main.less
@@ -92,6 +92,7 @@ a {
     display: inline-block;
     margin-right: 0.5em;
     border-radius: 3px;
+    border: 0.5px solid #fff;
 }
 .tag-icon-0 {
     background: #fa6e6e;