diff --git a/requirements.in b/requirements.in
index d04f2fa18..f7f0afbe2 100644
--- a/requirements.in
+++ b/requirements.in
@@ -27,7 +27,7 @@ pyproj==3.3.1
 
 # PaaS
 awscli-cwlogs>=1.4,<1.5
-itsdangerous==2.0.1  # pyup: <2.1.0  Release 2.1.0 introduced a change that is not compatible with Flask 1.x
+itsdangerous==2.1.2
 notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@56.0.0
 govuk-frontend-jinja @ git+https://github.com/alphagov/govuk-frontend-jinja.git@v0.5.8-alpha
 
diff --git a/requirements.txt b/requirements.txt
index 2b7726ca1..7e4f4dc29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -91,7 +91,7 @@ idna==3.3
     # via requests
 importlib-metadata==4.11.4
     # via flask
-itsdangerous==2.0.1
+itsdangerous==2.1.2
     # via
     #   -r requirements.in
     #   flask