diff --git a/app/grandchallenge/challenges/serializers.py b/app/grandchallenge/challenges/serializers.py
index 7bff5e094e..4ba50bd544 100644
--- a/app/grandchallenge/challenges/serializers.py
+++ b/app/grandchallenge/challenges/serializers.py
@@ -34,7 +34,7 @@ class Meta:
         ]
 
     def get_publications(self, obj) -> list[str]:
-        return [p.identifier for p in obj.publications.all()]
+        return [p.identifier.url for p in obj.publications.all()]
 
     def get_start_date(self, obj) -> datetime | None:
         try:
diff --git a/app/grandchallenge/profiles/templates/socialaccount/signup.html b/app/grandchallenge/profiles/templates/socialaccount/signup.html
index 234413d1f8..487575eefe 100644
--- a/app/grandchallenge/profiles/templates/socialaccount/signup.html
+++ b/app/grandchallenge/profiles/templates/socialaccount/signup.html
@@ -1,4 +1,4 @@
-{% extends "socialaccount/base.html" %}
+{% extends "socialaccount/base_entrance.html" %}
 {% load crispy_forms_tags %}
 {% load i18n %}