diff --git a/.circleci/config.yml b/.circleci/config.yml
index 43a493f..7ba7917 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,9 +1,12 @@
 ---
-version: 2
+version: 2.1
 jobs:
   build:
     docker:
-      - image: circleci/python:2.7.17-stretch
+      - image: circleci/python:3.7.6
+         auth:
+            username: ${DOCKER_USER}
+            password: ${DOCKER_PASS}
     steps:
       - checkout
       - setup_remote_docker
diff --git a/shavar.ini b/shavar.ini
index d173a4b..e8b11db 100644
--- a/shavar.ini
+++ b/shavar.ini
@@ -58,3 +58,4 @@ default_proto_ver = 2.0
 lists_served = dir://shavar/tests/lists_served
 lists_root = tests
 sentry_dsn = ${SENTRY_DSN}
+refresh_lists_delay=21600
diff --git a/shavar.testing.ini b/shavar.testing.ini
index 5425ac5..f58ca83 100644
--- a/shavar.testing.ini
+++ b/shavar.testing.ini
@@ -92,7 +92,7 @@ override = True
 lists_served = dir://shavar/tests/lists_served
 # The amount of time to wait before refreshing the list_names_served from the
 # above lists_served source.
-refresh_lists_delay=600
+refresh_lists_delay=21600
 # The default protocol version to speak.  As yet, we only speak version
 # 2 of the protocol even though it has been superceded by Google.
 # Default value: 2
diff --git a/shavar/sources.py b/shavar/sources.py
index 07ecda8..2a95340 100644
--- a/shavar/sources.py
+++ b/shavar/sources.py
@@ -7,7 +7,7 @@
 from urllib.parse import urlparse
 
 from boto.exception import S3ResponseError
-from boto.s3.connection import S3Connection
+from boto import connect_s3
 
 from shavar.exceptions import NoDataError, ParseError
 from shavar.parse import parse_dir_source, parse_file_source
@@ -147,7 +147,7 @@ def __init__(self, source_url, refresh_interval):
 
     def _get_key(self):
         try:
-            conn = S3Connection()
+            conn = boto.connect_s3()
             bucket = conn.get_bucket(self.url.netloc)
         except S3ResponseError as e:
             raise NoDataError("Could not find bucket \"%s\": %s"
@@ -188,7 +188,7 @@ def __init__(self, source_url, refresh_interval):
 
     def load(self):
         # for the closures to minimize the number of connections to S3
-        conn = S3Connection()
+        conn = boto.connect_s3()
 
         try:
             bucket = conn.get_bucket(self.url.netloc)