diff --git a/.travis.yml b/.travis.yml
index 813e537f..64b678a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,5 +11,5 @@ env:
 
 rvm:
   - 2.2.4 # deployed
-  - 2.3.1
-  - 2.4.2
+  - 2.3.7
+  - 2.4.4