diff --git a/.travis.yml b/.travis.yml
index 8b7e2229..7401918e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,11 @@ rvm:
   - 2.5.1
   - 2.5.2
   - 2.5.3
+  - 2.5.4
+  - 2.5.5
   - 2.6.0
+  - 2.6.1
+  - 2.6.2
   - ruby-head
 before_install:
   - "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"