diff --git a/vchan.opam b/vchan.opam
index 76a4339..fa60c0e 100644
--- a/vchan.opam
+++ b/vchan.opam
@@ -10,7 +10,7 @@ authors: ["Vincent Bernardoff" "Jon Ludlam" "David Scott"]
 license: "ISC"
 tags: "org:mirage"
 homepage: "https://github.com/mirage/ocaml-vchan"
-doc: "https://mirage.github.io/ocaml-vchan"
+doc: "https://mirage.github.io/ocaml-vchan/"
 bug-reports: "https://github.com/mirage/ocaml-vchan/issues"
 depends: [
   "ocaml" {>= "4.04.0"}