diff --git a/.travis.yml b/.travis.yml
index 9252ca016..47a10d5f5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,9 +13,9 @@ addons:
 
 script: ./.travis-ci.sh
 env:
-  - OPAM_SWITCH=4.04.2
   - OPAM_SWITCH=4.05.0
   - OPAM_SWITCH=4.06.1
+  - OPAM_SWITCH=4.07.1
 # cache:
 #   directories:
 #   - $HOME/.opam
diff --git a/ocamlorg.opam b/ocamlorg.opam
index 7be59b19a..2b36a350e 100644
--- a/ocamlorg.opam
+++ b/ocamlorg.opam
@@ -6,7 +6,7 @@ license: "See LICENSE.md file."
 homepage: "https://github.com/ocaml/ocaml.org"
 bug-reports: "https://github.com/ocaml/ocaml.org/issues"
 depends: [
-  "ocaml" {>= "4.04.0"}
+  "ocaml" {>= "4.05.0"}
   "ocamlfind" {build}
   "base-bytes" {build}
   "omd" {>= "1.2.1"}