diff --git a/spawn.opam b/spawn.opam
index 36cb3d5..4c9aa48 100644
--- a/spawn.opam
+++ b/spawn.opam
@@ -4,6 +4,7 @@ authors: ["Jane Street Group, LLC <opensource@janestreet.com>"]
 homepage: "https://github.com/janestreet/spawn"
 bug-reports: "https://github.com/janestreet/spawn/issues"
 dev-repo: "git+https://github.com/janestreet/spawn.git"
+doc: "https://janestreet.github.io/spawn/"
 license: "Apache-2.0"
 build: [
   ["jbuilder" "build" "-p" name "-j" jobs]