diff --git a/.travis.yml b/.travis.yml
index df1ec47144b5..f5d3d6525b66 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,7 @@ rvm:
 jobs:
   include:
     - stage: linting
-      rvm: 2.5
+      rvm: 2.6
       env:
         - "TEST_TOOL=rubygems YAML=psych"
       script: util/ci rubocop
diff --git a/appveyor.yml b/appveyor.yml
index 7c0c0b1b0ac1..973a04d4e8eb 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,6 +12,7 @@ environment:
   - ruby_version: 23-x64
   - ruby_version: 24-x64
   - ruby_version: 25-x64
+  - ruby_version: 26-x64
   - ruby_version: _trunk
 
 init: