diff --git a/app/celery/tasks.py b/app/celery/tasks.py
index b5e732df5..c4ac1740a 100644
--- a/app/celery/tasks.py
+++ b/app/celery/tasks.py
@@ -326,6 +326,7 @@ def build_dvla_file(self, job_id):
             current_app.logger.info("All notifications for job {} are not persisted".format(job_id))
             self.retry(queue=QueueNames.RETRY, exc="All notifications for job {} are not persisted".format(job_id))
     except Exception as e:
+        # ? should this retry?
         current_app.logger.exception("build_dvla_file threw exception")
         raise e
 
diff --git a/requirements.txt b/requirements.txt
index 9d576ab16..094a657c8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,6 +26,6 @@ notifications-python-client==4.5.0
 awscli>=1.11,<1.12
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@21.5.0#egg=notifications-utils==21.5.0
+git+https://github.com/alphagov/notifications-utils.git@21.5.1#egg=notifications-utils==21.5.1
 
 git+https://github.com/alphagov/boto.git@2.43.0-patch3#egg=boto==2.43.0-patch3