diff --git a/assets/scss/partials/highlight/common.scss b/assets/scss/partials/highlight/common.scss
index c9b70bb..c680fa4 100644
--- a/assets/scss/partials/highlight/common.scss
+++ b/assets/scss/partials/highlight/common.scss
@@ -55,6 +55,7 @@
     margin-right: 0.4em;
     padding: 0 0.4em 0 0.4em;
     color: #7f7f7f;
+    display: block;
 }
 
 /* LineNumbers */