diff --git a/requirements.txt b/requirements.txt
index 5637048f6..ebc2f3565 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,4 +33,4 @@ notifications-python-client>=3.1,<3.2
 awscli>=1.11,<1.12
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@13.8.0#egg=notifications-utils==13.8.0
+git+https://github.com/alphagov/notifications-utils.git@13.9.1#egg=notifications-utils==13.9.1