diff --git a/site/common/styles/demo.less b/site/common/styles/demo.less
index d10e2d0ba3..4838d3116c 100644
--- a/site/common/styles/demo.less
+++ b/site/common/styles/demo.less
@@ -43,7 +43,7 @@
   border-color: #ccc;
 }
 
-.code-box-target {
+.code-box.code-box-target {
   border: 1px solid rgba(45, 183, 245, 0.7);
   box-shadow: 0 0 4px rgba(45, 183, 245, 0.5);
 }