diff --git a/src/Auth.php b/src/Auth.php
index 4fe16af..acbd79d 100644
--- a/src/Auth.php
+++ b/src/Auth.php
@@ -145,7 +145,7 @@ public static function register(array $credentials, array $uniques = [])
         }
 
         if (static::$settings['USE_TIMESTAMPS']) {
-            $now = (new \Leaf\Date())->tick()->now();
+            $now = (new \Leaf\Date())->tick()->format(static::$settings['TIMESTAMP_FORMAT']);
             $credentials['created_at'] = $now;
             $credentials['updated_at'] = $now;
         }
@@ -266,7 +266,7 @@ public static function update(array $credentials, array $uniques = [])
         }
 
         if (static::$settings['USE_TIMESTAMPS']) {
-            $credentials['updated_at'] = (new \Leaf\Date())->tick()->now();
+            $credentials['updated_at'] = (new \Leaf\Date())->tick()->format(static::$settings['TIMESTAMP_FORMAT']);
         }
 
         if (count($uniques) > 0) {
diff --git a/src/Auth/Core.php b/src/Auth/Core.php
index 3727718..f05ac92 100644
--- a/src/Auth/Core.php
+++ b/src/Auth/Core.php
@@ -27,6 +27,7 @@ class Core
         'DB_TABLE' => 'users',
         'AUTH_NO_PASS' => false,
         'USE_TIMESTAMPS' => true,
+        'TIMESTAMP_FORMAT' => 'c',
         'PASSWORD_ENCODE' => null,
         'PASSWORD_VERIFY' => null,
         'PASSWORD_KEY' => 'password',