diff --git a/dune-project b/dune-project
index 0407b41f34..a93d82f117 100644
--- a/dune-project
+++ b/dune-project
@@ -93,7 +93,7 @@
   (ocaml (>= 4.08))
   (js_of_ocaml-compiler (= :version))
   (ocamlfind (>= 1.5.1))
-  (cohttp-lwt-unix :with-test)
+  (cohttp-lwt-unix (and (>= 6.0.0) :with-test))
   (graphics :with-test)
   (num :with-test)
   (ppx_expect (and (>= v0.14.2) :with-test))
diff --git a/js_of_ocaml-toplevel.opam b/js_of_ocaml-toplevel.opam
index 6e0e3d675c..820a523a19 100644
--- a/js_of_ocaml-toplevel.opam
+++ b/js_of_ocaml-toplevel.opam
@@ -16,7 +16,7 @@ depends: [
   "ocaml" {>= "4.08"}
   "js_of_ocaml-compiler" {= version}
   "ocamlfind" {>= "1.5.1"}
-  "cohttp-lwt-unix" {with-test}
+  "cohttp-lwt-unix" {>= "6.0.0" & with-test}
   "graphics" {with-test}
   "num" {with-test}
   "ppx_expect" {>= "v0.14.2" & with-test}
diff --git a/toplevel/examples/server/server.ml b/toplevel/examples/server/server.ml
index d14cf2c229..4ddb58c8ad 100644
--- a/toplevel/examples/server/server.ml
+++ b/toplevel/examples/server/server.ml
@@ -31,7 +31,7 @@ let server () =
       >>= fun () -> Server.respond_file ~headers:header_plain_user_charset ~fname ()
     with _ ->
       (* send static file *)
-      let fname = Server.resolve_file ~docroot:"." ~uri in
+      let fname = Path.resolve_local_file ~docroot:"." ~uri in
       Lwt_io.eprintf "static: %s\n" fname
       >>= fun () ->
       let headers =