diff --git a/assets/js/main.js b/assets/js/main.js
index 733df19..e31c022 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -87,11 +87,9 @@ document.addEventListener('DOMContentLoaded', function () {
         event.preventDefault();
 
         const formData = new FormData(addMemberForm);
-        formData.append('action', 'add');
-
         fetch('api_members.php', {
             method: 'POST',
-            body: formData
+            body: new URLSearchParams(formData)
         })
         .then(response => response.json())
         .then(data => {