diff --git a/app/dao/notifications_dao.py b/app/dao/notifications_dao.py
index b1a3fa2fb..5aa8d72a1 100644
--- a/app/dao/notifications_dao.py
+++ b/app/dao/notifications_dao.py
@@ -6,7 +6,7 @@ from datetime import (
     timedelta,
 )
 
-from boto.exception import BotoClientError
+from botocore.exceptions import ClientError
 from flask import current_app
 from notifications_utils.international_billing_rates import INTERNATIONAL_BILLING_RATES
 from notifications_utils.recipients import (
@@ -438,7 +438,7 @@ def _delete_letters_from_s3(
             for s3_object in s3_objects:
                 try:
                     remove_s3_object(bucket_name, s3_object['Key'])
-                except BotoClientError:
+                except ClientError:
                     current_app.logger.exception(
                         "Could not delete S3 object with filename: {}".format(s3_object['Key']))
 
diff --git a/requirements-app.txt b/requirements-app.txt
index 84041e4ba..73500d0de 100644
--- a/requirements-app.txt
+++ b/requirements-app.txt
@@ -2,7 +2,7 @@
 # with package version changes made in requirements-app.txt
 
 cffi==1.13.1
-celery==3.1.26.post2 # pyup: <4
+celery[sqs]==3.1.26.post2 # pyup: <4
 docopt==0.6.2
 Flask-Bcrypt==0.7.1
 flask-marshmallow==0.10.1
@@ -30,5 +30,3 @@ awscli-cwlogs>=1.4,<1.5
 itsdangerous==0.24  # pyup: <1.0.0
 
 git+https://github.com/alphagov/notifications-utils.git@36.5.0#egg=notifications-utils==36.5.0
-
-git+https://github.com/alphagov/boto.git@2.43.0-patch3#egg=boto==2.43.0-patch3
diff --git a/requirements.txt b/requirements.txt
index 353043f47..c94ebaa7f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 # with package version changes made in requirements-app.txt
 
 cffi==1.13.1
-celery==3.1.26.post2 # pyup: <4
+celery[sqs]==3.1.26.post2 # pyup: <4
 docopt==0.6.2
 Flask-Bcrypt==0.7.1
 flask-marshmallow==0.10.1
@@ -33,23 +33,22 @@ itsdangerous==0.24  # pyup: <1.0.0
 
 git+https://github.com/alphagov/notifications-utils.git@36.5.0#egg=notifications-utils==36.5.0
 
-git+https://github.com/alphagov/boto.git@2.43.0-patch3#egg=boto==2.43.0-patch3
-
 ## The following requirements were added by pip freeze:
-alembic==1.3.3
+alembic==1.4.0
 amqp==1.4.9
 anyjson==0.3.3
 attrs==19.3.0
-awscli==1.17.9
+awscli==1.17.15
 bcrypt==3.1.7
 billiard==3.3.0.23
 bleach==3.1.0
+boto==2.49.0
 boto3==1.10.38
-botocore==1.14.9
+botocore==1.14.15
 certifi==2019.11.28
 chardet==3.0.4
 Click==7.0
-colorama==0.4.1
+colorama==0.4.3
 dnspython==1.16.0
 docutils==0.15.2
 flask-redis==0.4.0
@@ -78,11 +77,11 @@ PyYAML==5.2
 redis==3.4.1
 requests==2.22.0
 rsa==3.4.2
-s3transfer==0.3.2
+s3transfer==0.3.3
 six==1.14.0
 smartypants==2.0.1
 statsd==3.3.0
 urllib3==1.25.8
 webencodings==0.5.1
-Werkzeug==0.16.1
-zipp==2.1.0
+Werkzeug==1.0.0
+zipp==2.2.0