diff --git a/frontend/vanilla/html/register.html b/frontend/vanilla/html/register.html
index b5d8525..3eb5eba 100644
--- a/frontend/vanilla/html/register.html
+++ b/frontend/vanilla/html/register.html
@@ -33,15 +33,18 @@
         </div>
       </div>
 
+      <script src="../js/constants.js"></script>
+      <script src="../js/utils.js"></script>
+
       <script>
 
         function register(){
-          const display_name = document.getElementById("displayname").value;
-          const email = document.getElementById("email").value;
-          const password = document.getElementById("password").value;
+          const display_name = document.getElementById('displayname').value;
+          const email = document.getElementById('email').value;
+          const password = document.getElementById('password').value;
           
           if(!display_name || !email || !password){
-            return;
+            alert('Please fill in all fields');
           }
 
           const options = {
@@ -52,7 +55,7 @@
             body: JSON.stringify({ display_name, email, password }),
           };
 
-          fetch('http://localhost:3000/blinkapi/register', options)
+          fetch(`${API_URL}/register`, options)
             .then(response => {
               if (response.ok) {
                 alert("Congratulations! You've successfully registered to Blink." +