diff --git a/requirements-app.txt b/requirements-app.txt
index 30c25d2d7..b268c62e0 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -23,5 +23,5 @@ notifications-python-client==5.5.1
 awscli-cwlogs>=1.4,<1.5
 itsdangerous==1.1.0
 
-git+https://github.com/alphagov/notifications-utils.git@39.4.0#egg=notifications-utils==39.4.0
+git+https://github.com/alphagov/notifications-utils.git@39.4.1#egg=notifications-utils==39.4.1
 git+https://github.com/alphagov/govuk-frontend-jinja.git@v0.5.1-alpha#egg=govuk-frontend-jinja==0.5.1-alpha
diff --git a/requirements.txt b/requirements.txt
index 836a10979..070b2ed8d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ notifications-python-client==5.5.1
 awscli-cwlogs>=1.4,<1.5
 itsdangerous==1.1.0
 
-git+https://github.com/alphagov/notifications-utils.git@39.4.0#egg=notifications-utils==39.4.0
+git+https://github.com/alphagov/notifications-utils.git@39.4.1#egg=notifications-utils==39.4.1
 git+https://github.com/alphagov/govuk-frontend-jinja.git@v0.5.1-alpha#egg=govuk-frontend-jinja==0.5.1-alpha
 
 ## The following requirements were added by pip freeze: