diff --git a/deux/serializers.py b/deux/serializers.py
index d6905d4..4c39acd 100644
--- a/deux/serializers.py
+++ b/deux/serializers.py
@@ -39,6 +39,7 @@ def to_representation(self, mfa_instance):
 
     class Meta:
         model = mfa_settings.MFA_MODEL
+        fields = '__all__'
 
 
 class _BaseChallengeRequestSerializer(MultiFactorAuthSerializer):