diff --git a/.travis.yml b/.travis.yml
index b8681bf..c812584 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: c
 sudo: required
 install: wget https://raw.githubusercontent.com/ocaml/ocaml-ci-scripts/master/.travis-opam.sh
 env:
-  - OCAML_VERSION=4.03 PACKAGE="bisect-summary"
+  - OCAML_VERSION=4.02 PACKAGE="bisect-summary"
 os:
   - linux
 script: