diff --git a/resources/sass/_codemirror.scss b/resources/sass/_codemirror.scss
index e419ab524..330923d4f 100644
--- a/resources/sass/_codemirror.scss
+++ b/resources/sass/_codemirror.scss
@@ -439,6 +439,7 @@ html.dark-mode .CodeMirror pre {
   width: 100%;
   height: 100%;
   margin-bottom: 0;
+  border: 0;
 }
 
 /**