diff --git a/core/models.py b/core/models.py
index 50fbd7d..3d29c75 100644
--- a/core/models.py
+++ b/core/models.py
@@ -17,7 +17,7 @@ class MyUserManager(BaseUserManager):
     def create_superuser(self, email, password=None, **extra_fields):
         extra_fields.setdefault('is_staff', True)
         extra_fields.setdefault('is_superuser', True)
-
+        email = self.normalize_email(email)
         if extra_fields.get('is_staff') is not True:
             raise ValueError(_('Superuser must have is_staff=True.'))
         if extra_fields.get('is_superuser') is not True: