diff --git a/.travis.yml b/.travis.yml
index 43ec96d..a065da4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,9 @@ rvm:
   - 2.2.0
   - 2.3.0
   - 2.4.0
+  - 2.5.1
+  - 2.6.3
+  - 2.7.1
 script:
   - bundle exec rake compile
   - bundle exec rake clean