diff --git a/package.json b/package.json
index 12a121e..9101807 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,14 @@
 {
   "name": "@editorjs/header",
-  "version": "2.8.6",
+  "version": "2.8.7",
   "keywords": [
     "codex editor",
     "header",
+    "heading",
     "editor.js",
     "editorjs"
   ],
-  "description": "Header Tool for Editor.js",
+  "description": "Heading Tool for Editor.js",
   "license": "MIT",
   "repository": "https://github.com/editor-js/header",
   "files": [
diff --git a/src/index.ts b/src/index.ts
index 79fb250..506312c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -144,7 +144,7 @@ export default class Header {
    * @private
    */
   isHeaderData(data: any): data is HeaderData {
-    return (data as HeaderData).text !== undefined && (data as HeaderData).level !== undefined;
+    return (data as HeaderData).text !== undefined;
   }
 
   /**
@@ -158,13 +158,14 @@ export default class Header {
   normalizeData(data: HeaderData | {}): HeaderData {
     const newData: HeaderData = { text: '', level: this.defaultLevel.number };
 
-    if (!this.isHeaderData(data)) {
-      return { text: '', level: this.defaultLevel.number};
+    if (this.isHeaderData(data)) {
+      newData.text = data.text || '';
+  
+      if (data.level !== undefined && !isNaN(parseInt(data.level.toString()))) {
+        newData.level = parseInt(data.level.toString());
+      }
     }
 
-    newData.text = data.text || '';
-    newData.level = parseInt(data.level.toString()) || this.defaultLevel.number;
-
     return newData;
   }