diff --git a/taiga/projects/serializers.py b/taiga/projects/serializers.py
index d6d12b86..e6003bd8 100644
--- a/taiga/projects/serializers.py
+++ b/taiga/projects/serializers.py
@@ -102,6 +102,7 @@ class MembershipSerializer(ModelSerializer):
     class Meta:
         model = models.Membership
         read_only_fields = ("user",)
+        exclude = ("token",)
 
     def get_photo(self, project):
         return get_photo_or_gravatar_url(project.user)