diff --git a/internal_packages/composer-markdown/stylesheets/index.less b/internal_packages/composer-markdown/stylesheets/index.less
index b86efb37a..ac0f61720 100644
--- a/internal_packages/composer-markdown/stylesheets/index.less
+++ b/internal_packages/composer-markdown/stylesheets/index.less
@@ -18,14 +18,10 @@
 }
 
 .CodeMirror {
-  height: 300px;
+  height: 225px;
+  min-height: 225px;
   background: transparent;
 }
 .CodeMirror-sided {
   display: inline-block;
 }
-.editor-preview-side.editor-preview-active-side {
-  position: static;
-  display: inline-block;
-  height: 300px;
-}