diff --git a/server/controllers/user/signup.php b/server/controllers/user/signup.php
index f9b28273..db5c9630 100644
--- a/server/controllers/user/signup.php
+++ b/server/controllers/user/signup.php
@@ -11,15 +11,15 @@ class SignUpController extends Controller {
             'permission' => 'any',
             'requestData' => [
                 'name' => [
-                    'validation' => DataValidator::length(2, 55),
+                    'validation' => DataValidator::length(2, 55)->alpha(),
                     'error' => ERRORS::INVALID_NAME
                 ],
                 'email' => [
-                    'validation' => DataValidator::contains('@'),
+                    'validation' => DataValidator::email(),
                     'error' => ERRORS::INVALID_EMAIL
                 ],
                 'password' => [
-                    'validation' => DataValidator::length(5, 20),
+                    'validation' => DataValidator::length(5, 200),
                     'error' => ERRORS::INVALID_PASSWORD
                 ]
             ]