diff --git a/requirements-app.txt b/requirements-app.txt
index d078e09bb..fe0ad2acd 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -20,9 +20,7 @@ notifications-python-client==5.5.1
 
 # PaaS
 awscli-cwlogs>=1.4,<1.5
-
-# Putting upgrade on hold due to v1.0.0 using sha512 instead of sha1 by default
-itsdangerous==0.24  # pyup: <1.0.0
+itsdangerous==1.1.0
 
 git+https://github.com/alphagov/notifications-utils.git@36.9.3#egg=notifications-utils==36.9.3
 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 3ae10fb2f..78dfc0df7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,9 +22,7 @@ notifications-python-client==5.5.1
 
 # PaaS
 awscli-cwlogs>=1.4,<1.5
-
-# Putting upgrade on hold due to v1.0.0 using sha512 instead of sha1 by default
-itsdangerous==0.24  # pyup: <1.0.0
+itsdangerous==1.1.0
 
 git+https://github.com/alphagov/notifications-utils.git@36.9.3#egg=notifications-utils==36.9.3
 git+https://github.com/alphagov/govuk-frontend-jinja.git@v0.5.1-alpha#egg=govuk-frontend-jinja==0.5.1-alpha