diff --git a/requirements.txt b/requirements.txt
index e13d6cda5..a30cd42fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,6 @@ Pygments==2.0.2
 py-gfm==0.1.2
 blinker==1.4
 
-git+https://github.com/alphagov/notifications-python-client.git@0.5.0#egg=notifications-python-client==0.5.0
+git+https://github.com/alphagov/notifications-python-client.git@1.0.0#egg=notifications-python-client==1.0.0
 
 git+https://github.com/alphagov/notifications-utils.git@5.2.0#egg=notifications-utils==5.2.0