.travis.yml in cfndsl-1.3.2 vs .travis.yml in cfndsl-1.3.3

@@ -1,9 +1,9 @@
 language: ruby
 rvm:  # all MRI ruby versions that are not EOL
-- 2.7
-- 2.6
+- '2.7'
+- '2.6'
 - '3.0'
 sudo: false
 before_install:
   - gem update --system
   - gem install bundler
@@ -13,9 +13,10 @@
     secure: cIDF27JCirxxg7SXw6R+xxABMwCrrirJiJzljVxb/MdlRyUVaSW8XdZjOVyNgJkCx+vQOX4U+hp+p0xVI/Loh4EXkgbDvu2oGIAn/g1lfWabwKtdkFEviQn4tWvqDcEkxm5Hm6Gs0pFCaurqynMPNbsLVAEIiSw+la8LxEeeQ6I=
   gem: cfndsl
   on:
     tags: true
     repo: cfndsl/cfndsl
+    ruby: '2.7'
 notifications:
   email:
     recipients:
     - [e-mail]
     on_failure: change