diff --git a/requirements.in b/requirements.in
index aa3c92a159..d520885934 100644
--- a/requirements.in
+++ b/requirements.in
@@ -17,7 +17,7 @@ notifications-python-client==10.0.0
 fido2==1.1.3
 
 # Run `make bump-utils` to update to the latest version
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@de4d6573a0dfb5969156b5a7595f00c54f492cc0
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@91.0.0
 
 govuk-frontend-jinja==3.4.0
 
diff --git a/requirements.txt b/requirements.txt
index 62c4c78b9b..814cd1b0cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -107,7 +107,7 @@ mistune==0.8.4
     # via notifications-utils
 notifications-python-client==10.0.0
     # via -r requirements.in
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@de4d6573a0dfb5969156b5a7595f00c54f492cc0
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@91.0.0
     # via -r requirements.in
 openpyxl==3.0.10
     # via pyexcel-xlsx
@@ -115,7 +115,7 @@ ordered-set==4.1.0
     # via notifications-utils
 packaging==23.1
     # via gunicorn
-phonenumbers==8.13.48
+phonenumbers==8.13.50
     # via notifications-utils
 pillow==10.3.0
     # via -r requirements.in
diff --git a/requirements_for_test.txt b/requirements_for_test.txt
index 389935b420..ab8c17541f 100644
--- a/requirements_for_test.txt
+++ b/requirements_for_test.txt
@@ -142,7 +142,7 @@ mypy-extensions==1.0.0
     # via black
 notifications-python-client==10.0.0
     # via -r requirements.in
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@de4d6573a0dfb5969156b5a7595f00c54f492cc0
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@91.0.0
     # via -r requirements.in
 openpyxl==3.0.10
     # via pyexcel-xlsx
@@ -155,7 +155,7 @@ packaging==23.1
     #   pytest
 pathspec==0.12.1
     # via black
-phonenumbers==8.13.48
+phonenumbers==8.13.50
     # via notifications-utils
 pillow==10.3.0
     # via -r requirements.in