diff --git a/requirements.txt b/requirements.txt
index 6483a8296..68d81c08f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,4 +21,4 @@ monotonic==0.3
 
 git+https://github.com/alphagov/notifications-python-client.git@0.2.6#egg=notifications-python-client==0.2.6
 
-git+https://github.com/alphagov/notifications-utils.git@3.2.1#egg=notifications-utils==3.2.1
+git+https://github.com/alphagov/notifications-utils.git@3.3.1#egg=notifications-utils==3.3.1