diff --git a/packages/ui/src/RichEditor/MarkdownPasteExtension.ts b/packages/ui/src/RichEditor/MarkdownPasteExtension.ts
index 287f593f9..d1cb16f18 100644
--- a/packages/ui/src/RichEditor/MarkdownPasteExtension.ts
+++ b/packages/ui/src/RichEditor/MarkdownPasteExtension.ts
@@ -18,6 +18,10 @@ export const MarkdownPasteExtension = Extension.create({
         key: markdownPasteKey,
         props: {
           handlePaste(view, event) {
+            if (event.clipboardData?.getData("text/html")) {
+              return false;
+            }
+
             const text = event.clipboardData?.getData("text/plain") ?? "";
             if (!hasMarkdown(text)) {
               return false;