dip.yml in string_tools-0.8.0 vs dip.yml in string_tools-0.9.0

@@ -1,9 +1,9 @@
 version: '1'
 
 environment:
-  DOCKER_RUBY_VERSION: 1.9.3
-  RUBY_IMAGE_TAG: 1.9.3-3
+  DOCKER_RUBY_VERSION: 2.2
+  RUBY_IMAGE_TAG: 2.2-latest
   COMPOSE_FILE_EXT: development
   RAILS_ENV: test
 
 compose:
   files: