.circleci/config.yml in blurb-0.3.2 vs .circleci/config.yml in blurb-0.4.0

@@ -4,11 +4,11 @@
 #
 version: 2
 jobs:
   build:
     docker:
-       - image: circleci/ruby:2.4.4
+       - image: circleci/ruby:2.6.2
 
     steps:
       - checkout
 
       # Download and cache dependencies
@@ -19,9 +19,10 @@
           - v1-dependencies-
 
       - run:
           name: install dependencies
           command: |
+            gem install bundler -v 2.0.2
             bundle install --jobs=4 --retry=3 --path vendor/bundle
 
       - save_cache:
           paths:
             - vendor/bundle