diff --git a/js/customElements/blogIndex.js b/js/customElements/blogIndex.js
index 665cb346cc245b34fb31f11a3ba2253ea236836c..b356df7970ef4d14c85ed600928ae8cdac868df2 100644
--- a/js/customElements/blogIndex.js
+++ b/js/customElements/blogIndex.js
@@ -16,7 +16,7 @@ class BlogIndex extends HTMLElement {
                         article.appendChild(h2);
 
                         const content = document.createElement("p");
-                        content.classList.appendChild("breakWord");
+                        content.classList.add("breakWord");
                         content.innerHTML = element["content"];
                         article.appendChild(content);