docker-compose.yml in soulless-1.2.0 vs docker-compose.yml in soulless-1.2.1

@@ -1,8 +1,8 @@
 version: '2'
 services:
   lib:
-    image: sticksnleaves/ruby-project:2.3
+    image: sticksnleaves/ruby-project:2.4
     command: rspec
     volumes:
       - .:/usr/src/app
       - lib.volume:/usr/local/bundle
 volumes: