killbill-uncached

diff --git a/.circleci/config.yml b/.circleci/config.yml
index ccde348..ada2982 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -8,7 +8,7 @@ jobs:
   build:
     <<: *defaults
     docker:
-      - image: killbill/kbbuild:0.1.0
+      - image: killbill/kbbuild:0.4.0
     steps:
       - checkout
       - restore_cache:
@@ -38,7 +38,7 @@ jobs:
   test-h2:
     <<: *defaults
     docker:
-      - image: killbill/kbbuild:0.1.0
+      - image: killbill/kbbuild:0.4.0
     steps:
       - checkout
       - restore_cache:
@@ -57,8 +57,8 @@ jobs:
   test-mysql:
     <<: *defaults
     docker:
-      - image: killbill/kbbuild:0.1.0
-      - image: killbill/mariadb:0.18
+      - image: killbill/kbbuild:0.4.0
+      - image: killbill/mariadb:0.19
         environment:
         - MYSQL_ROOT_PASSWORD=root
     steps:
@@ -96,8 +96,8 @@ jobs:
   test-postgresql:
     <<: *defaults
     docker:
-      - image: killbill/kbbuild:0.1.0
-      - image: killbill/postgresql:0.18
+      - image: killbill/kbbuild:0.4.0
+      - image: killbill/postgresql:0.19
         environment:
         - POSTGRES_PASSWORD=postgres
     steps:
@@ -122,8 +122,8 @@ jobs:
   integration-tests:
     <<: *defaults
     docker:
-      - image: killbill/kbbuild:0.1.0
-      - image: killbill/mariadb:0.18
+      - image: killbill/kbbuild:0.4.0
+      - image: killbill/mariadb:0.19
         environment:
         - MYSQL_ROOT_PASSWORD=root
     steps:
@@ -149,7 +149,9 @@ jobs:
                 git checkout -b ${CIRCLE_BRANCH} origin/${CIRCLE_BRANCH}
               fi
             fi
-            bundle install
+            source /usr/share/rvm/scripts/rvm
+            rvm use ruby-2.4.2
+            bundle install --jobs=4 --retry=3 --path=vendor/bundle
 
             count=0
             until $(curl --output /dev/null --silent --fail http://127.0.0.1:8080/1.0/healthcheck); do