diff --git a/app/v2/broadcast/post_broadcast.py b/app/v2/broadcast/post_broadcast.py
index c5fae20a8..ff4ecc977 100644
--- a/app/v2/broadcast/post_broadcast.py
+++ b/app/v2/broadcast/post_broadcast.py
@@ -43,7 +43,10 @@ def create_broadcast():
     validate(broadcast_json, post_broadcast_schema)
 
     polygons = Polygons(list(chain.from_iterable((
-        area['polygons'] for area in broadcast_json['areas']
+        [
+            [[y, x] for x, y in polygon]
+            for polygon in area['polygons']
+        ] for area in broadcast_json['areas']
     ))))
 
     template = BroadcastMessageTemplate.from_content(
@@ -70,7 +73,7 @@ def create_broadcast():
             'areas': [
                 area['name'] for area in broadcast_json['areas']
             ],
-            'simple_polygons': polygons.smooth.simplify.as_coordinate_pairs_long_lat,
+            'simple_polygons': polygons.smooth.simplify.as_coordinate_pairs_lat_long,
         },
         status=BroadcastStatusType.PENDING_APPROVAL,
         api_key_id=api_user.id,
diff --git a/requirements-app.txt b/requirements-app.txt
index 3215a4992..b88d033ff 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -38,7 +38,7 @@ notifications-python-client==6.0.2
 # PaaS
 awscli-cwlogs==1.4.6
 
-git+https://github.com/alphagov/notifications-utils.git@44.5.1#egg=notifications-utils==44.5.1
+git+https://github.com/alphagov/notifications-utils.git@45.0.1#egg=notifications-utils==45.0.1
 
 # gds-metrics requires prometheseus 0.2.0, override that requirement as 0.7.1 brings significant performance gains
 prometheus-client==0.10.1
diff --git a/requirements.txt b/requirements.txt
index ca60a7ce8..a902b6343 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ notifications-python-client==6.0.2
 # PaaS
 awscli-cwlogs==1.4.6
 
-git+https://github.com/alphagov/notifications-utils.git@44.5.1#egg=notifications-utils==44.5.1
+git+https://github.com/alphagov/notifications-utils.git@45.0.1#egg=notifications-utils==45.0.1
 
 # gds-metrics requires prometheseus 0.2.0, override that requirement as 0.7.1 brings significant performance gains
 prometheus-client==0.10.1
@@ -51,16 +51,16 @@ alembic==1.6.5
 amqp==1.4.9
 anyjson==0.3.3
 attrs==21.2.0
-awscli==1.20.8
+awscli==1.20.24
 bcrypt==3.2.0
 billiard==3.3.0.23
 bleach==3.3.0
 blinker==1.4
 boto==2.49.0
-boto3==1.18.8
-botocore==1.21.8
+boto3==1.18.24
+botocore==1.21.24
 certifi==2021.5.30
-charset-normalizer==2.0.3
+charset-normalizer==2.0.4
 click==8.0.1
 colorama==0.4.3
 dnspython==1.16.0
@@ -68,8 +68,9 @@ docutils==0.15.2
 flask-redis==0.4.0
 geojson==2.5.0
 govuk-bank-holidays==0.9
-greenlet==1.1.0
+greenlet==1.1.1
 idna==3.2
+importlib-metadata==4.6.4
 Jinja2==3.0.1
 jmespath==0.10.0
 kombu==3.0.37
@@ -78,11 +79,12 @@ MarkupSafe==2.0.1
 mistune==0.8.4
 orderedset==2.0.3
 packaging==21.0
-phonenumbers==8.12.28
+phonenumbers==8.12.30
 pyasn1==0.4.8
 pycparser==2.20
 pyparsing==2.4.7
 PyPDF2==1.26.0
+pyproj==3.0.1
 pyrsistent==0.18.0
 python-dateutil==2.8.2
 python-editor==1.0.4
@@ -98,5 +100,7 @@ six==1.16.0
 smartypants==2.0.1
 soupsieve==2.2.1
 statsd==3.3.0
+typing-extensions==3.10.0.0
 urllib3==1.26.6
 webencodings==0.5.1
+zipp==3.5.0
diff --git a/tests/app/v2/broadcast/test_post_broadcast.py b/tests/app/v2/broadcast/test_post_broadcast.py
index 0fd8de0c2..a4ce80f47 100644
--- a/tests/app/v2/broadcast/test_post_broadcast.py
+++ b/tests/app/v2/broadcast/test_post_broadcast.py
@@ -103,9 +103,9 @@ def test_valid_post_cap_xml_broadcast_returns_201(
     assert response_json['personalisation'] is None
     assert response_json['service_id'] == str(sample_broadcast_service.id)
     assert len(response_json['simple_polygons']) == 1
-    assert len(response_json['simple_polygons'][0]) == 23
-    assert response_json['simple_polygons'][0][0] == [53.10562, 0.244127]
-    assert response_json['simple_polygons'][0][-1] == [53.10562, 0.244127]
+    assert len(response_json['simple_polygons'][0]) == 27
+    assert response_json['simple_polygons'][0][0] == [53.10635, 0.240159]
+    assert response_json['simple_polygons'][0][-1] == [53.10635, 0.240159]
     assert response_json['starts_at'] is None
     assert response_json['status'] == 'pending-approval'
     assert response_json['template_id'] is None