diff --git a/src/components/CodemirrorEditor/EditorHeader/StyleOptionMenu.vue b/src/components/CodemirrorEditor/EditorHeader/StyleOptionMenu.vue
index 43fc964..42c3593 100644
--- a/src/components/CodemirrorEditor/EditorHeader/StyleOptionMenu.vue
+++ b/src/components/CodemirrorEditor/EditorHeader/StyleOptionMenu.vue
@@ -48,7 +48,7 @@ export default {
 </script>
 
 <style lang="less" scoped>
-.style-option-menu {
+.style-option-menu.el-dropdown {
   margin: 0;
   width: 150px;