diff --git a/app/config.py b/app/config.py
index 086e84935..eb2cdd5e2 100644
--- a/app/config.py
+++ b/app/config.py
@@ -100,6 +100,7 @@ class Config(object):
     LOGO_UPLOAD_BUCKET_NAME = 'public-logos-local'
     ROUTE_SECRET_KEY_1 = os.environ.get('ROUTE_SECRET_KEY_1', '')
     ROUTE_SECRET_KEY_2 = os.environ.get('ROUTE_SECRET_KEY_2', '')
+    CHECK_PROXY_HEADER = False
 
 
 class Development(Config):
@@ -130,6 +131,7 @@ class Preview(Config):
     CSV_UPLOAD_BUCKET_NAME = 'preview-notifications-csv-upload'
     LOGO_UPLOAD_BUCKET_NAME = 'public-logos-preview'
     NOTIFY_ENVIRONMENT = 'preview'
+    CHECK_PROXY_HEADER = True
 
 
 class Staging(Config):
@@ -140,6 +142,7 @@ class Staging(Config):
     CSV_UPLOAD_BUCKET_NAME = 'staging-notify-csv-upload'
     LOGO_UPLOAD_BUCKET_NAME = 'public-logos-staging'
     NOTIFY_ENVIRONMENT = 'staging'
+    CHECK_PROXY_HEADER = True
 
 
 class Live(Config):
@@ -150,6 +153,7 @@ class Live(Config):
     CSV_UPLOAD_BUCKET_NAME = 'live-notifications-csv-upload'
     LOGO_UPLOAD_BUCKET_NAME = 'public-logos-production'
     NOTIFY_ENVIRONMENT = 'live'
+    CHECK_PROXY_HEADER = False
 
 
 class CloudFoundryConfig(Config):
diff --git a/requirements.txt b/requirements.txt
index 941f5c1a5..f73536619 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,4 +21,4 @@ notifications-python-client==4.6.0
 awscli>=1.11,<1.12
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@22.0.0#egg=notifications-utils==22.0.0
+git+https://github.com/alphagov/notifications-utils.git@22.1.0#egg=notifications-utils==22.1.0