diff --git a/requirements.txt b/requirements.txt
index 3fad677df..37f233393 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,4 +18,4 @@ pytz==2016.4
 
 git+https://github.com/alphagov/notifications-python-client.git@1.3.0#egg=notifications-python-client==1.3.0
 
-git+https://github.com/alphagov/notifications-utils.git@9.1.0#egg=notifications-utils==9.1.0
+git+https://github.com/alphagov/notifications-utils.git@9.1.1#egg=notifications-utils==9.1.1