diff --git a/dj_rest_auth/registration/serializers.py b/dj_rest_auth/registration/serializers.py
index ea9abab..01a27a1 100644
--- a/dj_rest_auth/registration/serializers.py
+++ b/dj_rest_auth/registration/serializers.py
@@ -225,9 +225,9 @@ class RegisterSerializer(serializers.Serializer):
     username = serializers.CharField(
         max_length=get_username_max_length(),
         min_length=allauth_account_settings.USERNAME_MIN_LENGTH,
-        required=allauth_account_settings.USERNAME_REQUIRED,
+        required=allauth_account_settings.SIGNUP_FIELDS.get('username', {}).get('required', True),
     )
-    email = serializers.EmailField(required=allauth_account_settings.EMAIL_REQUIRED)
+    email = serializers.EmailField(required=allauth_account_settings.SIGNUP_FIELDS.get('email', {}).get('required', True))
     password1 = serializers.CharField(write_only=True)
     password2 = serializers.CharField(write_only=True)