diff --git a/.merlin b/.merlin
index 0110f580..7c0e44d1 100644
--- a/.merlin
+++ b/.merlin
@@ -19,3 +19,4 @@ PKG threads.posix
 PKG lwt
 PKG qcheck
 FLG -w +a-4-44-48-60
+FLG -open CCPervasives
diff --git a/opam b/opam
index 3601a755..30394078 100644
--- a/opam
+++ b/opam
@@ -40,6 +40,6 @@ conflicts: [
 tags: [ "stdlib" "containers" "iterators" "list" "heap" "queue" ]
 homepage: "https://github.com/c-cube/ocaml-containers/"
 doc: "http://cedeela.fr/~simon/software/containers/"
-available: [ocaml-version >= "4.01.0"]
+available: [ocaml-version >= "4.02.3"]
 dev-repo: "https://github.com/c-cube/ocaml-containers.git"
 bug-reports: "https://github.com/c-cube/ocaml-containers/issues/"