.travis.yml in aptible-api-1.6.0 vs .travis.yml in aptible-api-1.6.1

@@ -1,9 +1,9 @@
 sudo: false
 
 rvm:
-  - "2.1"
-  - "2.2"
+  - "2.1.10"
+  - "2.2.10"
   - "2.3"
   - "2.4"
   - "2.5"
   - "2.6"