diff --git a/packages/markdown/src/lib/MarkdownPlugin.ts b/packages/markdown/src/lib/MarkdownPlugin.ts
index 1e9ff29e44..872251154b 100644
--- a/packages/markdown/src/lib/MarkdownPlugin.ts
+++ b/packages/markdown/src/lib/MarkdownPlugin.ts
@@ -63,7 +63,7 @@ export const MarkdownPlugin = createTSlatePlugin<MarkdownConfig>({
   .extend(({ api }) => ({
     parser: {
       deserialize: ({ data }) => api.markdown.deserialize(data),
-      format: 'text/plain',
+      format: 'text/markdown',
       query: ({ data, dataTransfer }) => {
         const htmlData = dataTransfer.getData('text/html');
 
diff --git a/packages/markdown/src/lib/remark-slate/remarkDefaultElementRules.ts b/packages/markdown/src/lib/remark-slate/remarkDefaultElementRules.ts
index 398797e106..f8a43d757a 100644
--- a/packages/markdown/src/lib/remark-slate/remarkDefaultElementRules.ts
+++ b/packages/markdown/src/lib/remark-slate/remarkDefaultElementRules.ts
@@ -50,15 +50,7 @@ export const remarkDefaultElementRules: RemarkElementRules = {
         6: 'h6',
       }[depth];
 
-      const type = options.editor.getType({ key: headingType });
-
-      if (!type) {
-
-        return {
-          children: remarkTransformElementChildren(node, options),
-          type: options.editor.getType({ key: 'p' }),
-        };
-      }
+      const type = options.editor.getType({ key: headingType ?? 'h3' });
 
       return {
         children: remarkTransformElementChildren(node, options),