diff --git a/app/src/assets/scss/protyle/_wysiwyg.scss b/app/src/assets/scss/protyle/_wysiwyg.scss
index 3357dd310..de8b02d94 100644
--- a/app/src/assets/scss/protyle/_wysiwyg.scss
+++ b/app/src/assets/scss/protyle/_wysiwyg.scss
@@ -177,6 +177,7 @@
           flex: 1;
           box-sizing: border-box;
           margin-right: 24px;
+          min-width: 1px;
 
           &:nth-last-child(2),
           &:last-child {