diff --git a/.travis.yml b/.travis.yml
index 920110c..02b4545 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.3.1
-  - 2.4.2
-  - 2.5.0
+  - 2.3.5
+  - 2.5.1
+#  - 2.6.3
 before_install:
   - gem update --remote bundler
 install: