diff --git a/src/app/actions.ts b/src/app/actions.ts
index 97cd728..3c3815a 100644
--- a/src/app/actions.ts
+++ b/src/app/actions.ts
@@ -134,7 +134,9 @@ export async function extractMetaData(url: string, keyword?: string) {
     const path: HeadlineNode[] = [];
 
     $("h1, h2, h3, h4, h5, h6").each((i, el) => {
-      const tag = $(el).prop("tagName").toLowerCase();
+      const tagName = $(el).prop("tagName");
+      if (!tagName) return;
+      const tag = tagName.toLowerCase();
       const text = $(el).text().trim();
       if (!text) return;