diff --git a/.travis.yml b/.travis.yml
index a028976..cd5590c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: ruby
 rvm:
   - 2.3.0
+  - 2.0.0-p598 # CentOS 7
+  - 2.1.5 # Debian 8
+
 addons:
   postgresql: "9.3"
 
--
libgit2 0.21.2