diff --git a/package.json b/package.json
index 9101807..2a928c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@editorjs/header",
-  "version": "2.8.7",
+  "version": "2.8.8",
   "keywords": [
     "codex editor",
     "header",
diff --git a/src/index.ts b/src/index.ts
index 506312c..e36face 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -215,12 +215,7 @@ export default class Header {
    * @public
    */
   merge(data: HeaderData): void {
-    const newData = {
-      text: this.data.text + data.text,
-      level: this.data.level,
-    };
-
-    this.data = newData;
+    this._element.insertAdjacentHTML('beforeend', data.text)
   }
 
   /**