diff --git a/packages/modulectomy.0.0.1~dev/opam b/packages/modulectomy.0.0.1~dev/opam
index a663d42..e1487c4 100644
--- a/packages/modulectomy.0.0.1~dev/opam
+++ b/packages/modulectomy.0.0.1~dev/opam
@@ -11,7 +11,7 @@ bug-reports: "https://github.com/Drup/modulectomy/issues"
 depends: [
   "ocaml" {>= "4.08.0"}
   "dune"
-  "owee"
+  "owee" {>= "0.5"}
   "iter"
   "containers"
   "containers-data"