diff --git a/packages/core/src/style.ts b/packages/core/src/style.ts
index 7a2563e8..ef5a0a29 100644
--- a/packages/core/src/style.ts
+++ b/packages/core/src/style.ts
@@ -27,6 +27,8 @@ img.ProseMirror-separator {
   display: inline !important;
   border: none !important;
   margin: 0 !important;
+  width: 1px !important;
+  height: 1px !important;
 }
 
 .ProseMirror-gapcursor {