diff --git a/src/renderer/src/assets/styles/markdown.scss b/src/renderer/src/assets/styles/markdown.scss
index ea76b47031..0c80d9f68a 100644
--- a/src/renderer/src/assets/styles/markdown.scss
+++ b/src/renderer/src/assets/styles/markdown.scss
@@ -321,6 +321,7 @@ mjx-container {
 
     .cm-gutters {
       line-height: 1.6;
+      border-right: none;
     }
 
     .cm-content {