diff --git a/config_defaults.yml b/config_defaults.yml
index 2f640be930f60b6ae49249ef7331ffe87c496de5..06f900444a97bce25c67a818bec3aabb5928d97a 100644
--- a/config_defaults.yml
+++ b/config_defaults.yml
@@ -111,7 +111,7 @@ appveyor.yml:
   appveyor_bundle_install: "bundle install --jobs 4 --retry 2 --without system_tests"
   use_litmus: false
   matrix:
-    - RUBY_VERSION: 24-x64
+    - RUBY_VERSION: 25-x64
       CHECK: "syntax lint metadata_lint check:symlinks check:git_ignore check:dot_underscore check:test_file rubocop"
     - PUPPET_GEM_VERSION: ~> 5.0
       RUBY_VERSION: 24