diff --git a/src/css/simplemde.css b/src/css/simplemde.css
index 9f5a61e..567d801 100644
--- a/src/css/simplemde.css
+++ b/src/css/simplemde.css
@@ -17,6 +17,8 @@
     bottom: 0;
     height: auto;
     z-index: 9;
+    border-right: none !important;
+    border-bottom-right-radius: 0 !important;
 }
 
 .CodeMirror-sided {