diff --git a/rest_auth/registration/serializers.py b/rest_auth/registration/serializers.py
index f5c444e..48d2963 100644
--- a/rest_auth/registration/serializers.py
+++ b/rest_auth/registration/serializers.py
@@ -10,8 +10,8 @@ except ImportError:
 
 
 class SocialLoginSerializer(serializers.Serializer):
-    access_token = serializers.CharField(required=False)
-    code = serializers.CharField(required=False)
+    access_token = serializers.CharField(required=False, allow_blank=True)
+    code = serializers.CharField(required=False, allow_blank=True)
 
     def _get_request(self):
         request = self.context.get('request')
diff --git a/rest_auth/serializers.py b/rest_auth/serializers.py
index 9cfb6b9..2b671da 100644
--- a/rest_auth/serializers.py
+++ b/rest_auth/serializers.py
@@ -15,8 +15,8 @@ from rest_framework.exceptions import ValidationError
 
 
 class LoginSerializer(serializers.Serializer):
-    username = serializers.CharField(required=False)
-    email = serializers.EmailField(required=False)
+    username = serializers.CharField(required=False, allow_blank=True)
+    email = serializers.EmailField(required=False, allow_blank=True)
     password = serializers.CharField(style={'input_type': 'password'})
 
     def validate(self, attrs):