diff --git a/requirements.in b/requirements.in
index 4fe8a2b52..8d6a452e4 100644
--- a/requirements.in
+++ b/requirements.in
@@ -29,7 +29,7 @@ notifications-python-client==6.3.0
 # PaaS
 awscli-cwlogs==1.4.6
 
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@55.1.4
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@55.1.6
 
 # gds-metrics requires prometheseus 0.2.0, override that requirement as 0.7.1 brings significant performance gains
 prometheus-client==0.14.1
diff --git a/requirements.txt b/requirements.txt
index ceb778020..58d879ffc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -105,9 +105,7 @@ geojson==2.5.0
 govuk-bank-holidays==0.10
     # via notifications-utils
 greenlet==1.1.2
-    # via
-    #   eventlet
-    #   sqlalchemy
+    # via eventlet
 gunicorn @ git+https://github.com/benoitc/gunicorn.git@1299ea9e967a61ae2edebe191082fd169b864c64
     # via -r requirements.in
 idna==3.3
@@ -158,7 +156,7 @@ mistune==0.8.4
     # via notifications-utils
 notifications-python-client==6.3.0
     # via -r requirements.in
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@55.1.4
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@55.1.6
     # via -r requirements.in
 orderedset==2.0.3
     # via notifications-utils
@@ -184,7 +182,7 @@ pyjwt==2.3.0
     #   notifications-python-client
 pyparsing==3.0.1
     # via packaging
-pypdf2==1.26.0
+pypdf2==1.27.12
     # via notifications-utils
 pyproj==3.2.1
     # via notifications-utils