diff --git a/public/js/main.js b/public/js/main.js
index e7d391a..0198786 100644
--- a/public/js/main.js
+++ b/public/js/main.js
@@ -58,6 +58,7 @@ const setString = (firstname = String, data = Object) => {
         infos.textContent = JSON.stringify(data[letter_value.toLowerCase()]);
 
         // Change parameter of tag
+        infos.className        = "firstname-letter"
         infos.style.visibility = "hidden";
         infos.style.position   = "absolute";