diff --git a/static/editor.css b/static/editor.css
index f838ef21b..fd2b68945 100644
--- a/static/editor.css
+++ b/static/editor.css
@@ -8,6 +8,7 @@
   overflow-y: scroll;
   overflow-x: auto;
   cursor: default;
+  -webkit-user-select: none;
 }
 
 .editor pre {