diff --git a/apps/users/serializers.py b/apps/users/serializers.py
index db40d1e..84522e7 100644
--- a/apps/users/serializers.py
+++ b/apps/users/serializers.py
@@ -5,7 +5,7 @@ from apps.users.models import User
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 
-phone_number_validator = RegexValidator(regex=r'^\+98[1-9]\d{10}$', message=_(
+phone_number_validator = RegexValidator(regex=r'^\+98[1-9]\d{9}$', message=_(
         "Phone number must be entered in the format: '+989999999999'."
     ),)
 class PublicUserSerializer(serializers.ModelSerializer):