diff --git a/.travis.yml b/.travis.yml
index 2462693..e76ef74 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ env:
   - PACKAGE=irmin-watcher
 matrix:
   include:
-  - env: OCAML_VERSION=4.02
+  - env: OCAML_VERSION=4.04
     os: linux
   - env: OCAML_VERSION=4.03
     os: linux