diff --git a/.travis.yml b/.travis.yml
index 1c42081..7f56e12 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,8 @@ env:
   - OCAML_VERSION=4.02
   - OCAML_VERSION=4.03
   - OCAML_VERSION=4.04
+  - OCAML_VERSION=4.05
+  - OCAML_VERSION=4.06
 os:
   - linux
   - osx