diff --git a/requirements.txt b/requirements.txt
index 7d6fbf67a..645eafb0d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,6 +25,6 @@ notifications-python-client==4.4.0
 awscli>=1.11,<1.12
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@21.3.0#egg=notifications-utils==21.3.0
+git+https://github.com/alphagov/notifications-utils.git@21.3.1#egg=notifications-utils==21.3.1
 
 git+https://github.com/alphagov/boto.git@2.43.0-patch3#egg=boto==2.43.0-patch3