.circleci/config.yml in german_numbers-0.5 vs .circleci/config.yml in german_numbers-0.7

@@ -1,28 +1,26 @@
 version: 2
 jobs:
   build:
     docker:
-       - image: circleci/ruby:2.4.1
+       - image: circleci/ruby:2.7.0
     working_directory: ~/german_numbers
 
     steps:
       - checkout
 
       - restore_cache:
           keys:
-          - v1-dependencies-{{ checksum "Gemfile.lock" }}
-          - v1-dependencies-
+          - dependencies-{{ checksum "Gemfile.lock" }}
 
       - run:
           name: install dependencies
           command: bundle install --jobs=4 --retry=3 --path vendor/bundle
 
       - save_cache:
           paths:
             - ./vendor/bundle
-          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
-
+          key: dependencies-{{ checksum "Gemfile.lock" }}
       - run:
           name: run rubocop
           command: bundle exec rubocop
       - run:
           name: run tests
\ No newline at end of file