diff --git a/webapp/serializers.py b/webapp/serializers.py
index 0ea20ee..e8789a2 100644
--- a/webapp/serializers.py
+++ b/webapp/serializers.py
@@ -47,7 +47,8 @@ class SignupSerializer(serializers.ModelSerializer):
 class SignupFormSerializer(serializers.HyperlinkedModelSerializer):
     questions = serializers.JSONField()
     signups = serializers.SlugRelatedField(
-        slug_field='list_name',
+        slug_field="list_name",
+        many=True,
         read_only=True,
         required=False,
     )