diff --git a/requirements.txt b/requirements.txt
index cd109a217..5a3798ba8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ elastic-apm==6.7.2
 factory-boy==3.2.0
 flower==1.2.0
 freezegun==1.1.0
-gevent==21.12.0
+gevent==23.9.1
 govuk-frontend-jinja @ git+https://github.com/alphagov/govuk-frontend-jinja.git@15845e4cca3a05df72c6e13ec6a7e35acc682f52
 govuk-tech-docs-sphinx-theme==1.0.0
 gunicorn==20.1.0