diff --git a/send_reset_link.php b/send_reset_link.php
index 45523b3..b487a38 100644
--- a/send_reset_link.php
+++ b/send_reset_link.php
@@ -19,10 +19,11 @@ if ($_SERVER["REQUEST_METHOD"] == "POST") {
 
             if ($user) {
                 $token = bin2hex(random_bytes(50));
-                $expires = date("U") + 1800; // 30 minutes
+                $expires_timestamp = time() + 1800; // 30 minutes
+                $expires_datetime = date('Y-m-d H:i:s', $expires_timestamp);
 
-                $stmt = $pdo->prepare("INSERT INTO password_resets (email, token, expires) VALUES (?, ?, ?)");
-                $stmt->execute([$email, $token, $expires]);
+                $stmt = $pdo->prepare("INSERT INTO password_resets (email, token, expires_at) VALUES (?, ?, ?)");
+                $stmt->execute([$email, $token, $expires_datetime]);
 
                 $reset_link = "http://" . $_SERVER['HTTP_HOST'] . "/reset_password_form.php?token=" . $token;