diff --git a/requirements.txt b/requirements.txt
index a36d0099b..8a3e83605 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,6 +25,6 @@ notifications-python-client==4.7.1
 awscli==1.14.25
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@23.5.0#egg=notifications-utils==23.5.0
+git+https://github.com/alphagov/notifications-utils.git@23.5.2#egg=notifications-utils==23.5.2
 
 git+https://github.com/alphagov/boto.git@2.43.0-patch3#egg=boto==2.43.0-patch3