diff --git a/app/__init__.py b/app/__init__.py
index 988b2b715..32bc88b88 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -76,7 +76,7 @@ def create_app(application):
     register_blueprint(application)
     register_v2_blueprints(application)
 
-    # avoid circular imports by importing this file later 😬
+    # avoid circular imports by importing this file later
     from app.commands import setup_commands
     setup_commands(application)
 
diff --git a/app/celery/celery.py b/app/celery/celery.py
index 59d240d07..76f92a809 100644
--- a/app/celery/celery.py
+++ b/app/celery/celery.py
@@ -1,9 +1,20 @@
+import time
+
 from flask import current_app
 from celery import Celery, Task
 
 
 class NotifyTask(Task):
     abstract = True
+    start = None
+
+    def on_success(self, retval, task_id, args, kwargs):
+        elapsed_time = time.time() - self.start
+        current_app.logger.info(
+            "{task_name} took {time}".format(
+                task_name=Task.name, time="{0:.4f}".format(elapsed_time)
+            )
+        )
 
     def on_failure(self, exc, task_id, args, kwargs, einfo):
         # ensure task will log exceptions to correct handlers
@@ -13,6 +24,7 @@ class NotifyTask(Task):
     def __call__(self, *args, **kwargs):
         # ensure task has flask context to access config, logger, etc
         with current_app.app_context():
+            self.start = time.time()
             return super().__call__(*args, **kwargs)
 
 
diff --git a/requirements.txt b/requirements.txt
index 4700c1d50..030a3b311 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,6 +25,6 @@ notifications-python-client==4.7.1
 awscli==1.14.31
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@23.5.2#egg=notifications-utils==23.5.2
+git+https://github.com/alphagov/notifications-utils.git@23.5.3#egg=notifications-utils==23.5.3
 
 git+https://github.com/alphagov/boto.git@2.43.0-patch3#egg=boto==2.43.0-patch3