diff --git a/examples/binary/.ocamlformat b/examples/binary/.ocamlformat
index 0eac260..bc9c6ce 100644
--- a/examples/binary/.ocamlformat
+++ b/examples/binary/.ocamlformat
@@ -1 +1 @@
-version = 0.12
+version = 0.19.0
diff --git a/examples/binary/CONTRIBUTING.md b/examples/binary/CONTRIBUTING.md
index 0ee9ff6..ef9f5e8 100644
--- a/examples/binary/CONTRIBUTING.md
+++ b/examples/binary/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 ## Setting up your working environment
 
-binary requires OCaml 4.09.0 or higher so you will need a corresponding opam
+binary requires OCaml 4.14.0 or higher so you will need a corresponding opam
 switch. You can install a switch with the latest OCaml version by running:
 
 ```
diff --git a/examples/binary/dune-project b/examples/binary/dune-project
index 09129c7..7cfa173 100644
--- a/examples/binary/dune-project
+++ b/examples/binary/dune-project
@@ -1,4 +1,4 @@
-(lang dune 2.0)
+(lang dune 2.9.1)
 (name binary)
 (implicit_transitive_deps false)
 
@@ -14,4 +14,4 @@
 Binary that depends on a tested library
 ")
  (documentation https://JoeBloggs.github.io/binary/)
- (depends alcotest fmt logs))
+ (depends (alcotest :with-test) fmt logs))
diff --git a/examples/binary/lib/dune b/examples/binary/lib/dune
index 24976ea..b542398 100644
--- a/examples/binary/lib/dune
+++ b/examples/binary/lib/dune
@@ -1,3 +1,4 @@
 (library
  (name binary)
+ (public_name binary)
  (libraries logs))
diff --git a/examples/executable/dune-project b/examples/executable/dune-project
index 929c696..3aad160 100644
--- a/examples/executable/dune-project
+++ b/examples/executable/dune-project
@@ -1 +1 @@
-(lang dune 2.0)
+(lang dune 2.9.1)
diff --git a/examples/library/.ocamlformat b/examples/library/.ocamlformat
index 0eac260..bc9c6ce 100644
--- a/examples/library/.ocamlformat
+++ b/examples/library/.ocamlformat
@@ -1 +1 @@
-version = 0.12
+version = 0.19.0
diff --git a/examples/library/CONTRIBUTING.md b/examples/library/CONTRIBUTING.md
index f5c8493..21ab694 100644
--- a/examples/library/CONTRIBUTING.md
+++ b/examples/library/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 ## Setting up your working environment
 
-library requires OCaml 4.09.0 or higher so you will need a corresponding opam
+library requires OCaml 4.14.0 or higher so you will need a corresponding opam
 switch. You can install a switch with the latest OCaml version by running:
 
 ```
diff --git a/examples/library/dune-project b/examples/library/dune-project
index 8c32354..d019d73 100644
--- a/examples/library/dune-project
+++ b/examples/library/dune-project
@@ -1,4 +1,4 @@
-(lang dune 2.0)
+(lang dune 2.9.1)
 (name library)
 (implicit_transitive_deps false)
 
@@ -14,4 +14,4 @@
 Single package in `src`
 ")
  (documentation https://JoeBloggs.github.io/library/)
- (depends alcotest fmt logs))
+ (depends (alcotest :with-test) fmt logs))
diff --git a/examples/library/src/dune b/examples/library/src/dune
index 15c6ac2..02893e0 100644
--- a/examples/library/src/dune
+++ b/examples/library/src/dune
@@ -1,3 +1,4 @@
 (library
  (name library)
+ (public_name library)
  (libraries logs))
diff --git a/lib/config.ml b/lib/config.ml
index e704661..1f4d515 100644
--- a/lib/config.ml
+++ b/lib/config.ml
@@ -7,6 +7,11 @@ type versions = {
   ocamlformat : string;
 }
 
+type dependency = {
+  dep_name : string;
+  dep_filter : string option;  (** For example, ["with-test"]. *)
+}
+
 type t = {
   name : string;
   project_synopsis : string;
@@ -15,7 +20,7 @@ type t = {
   github_organisation : string;
   initial_version : string;
   license : License.t;
-  dependencies : string list;
+  dependencies : dependency list;
   versions : versions;
   ocamlformat_options : (string * string) list;
   current_year : int;
diff --git a/lib/contents.ml b/lib/contents.ml
index d803162..85adb16 100644
--- a/lib/contents.ml
+++ b/lib/contents.ml
@@ -3,13 +3,18 @@ open Utils
 
 type file_printer = Config.t -> Format.formatter -> unit
 
+let dep_alcotest = { dep_name = "alcotest"; dep_filter = Some "with-test" }
+
+let project_dependencies config =
+  config.dependencies |> List.append [ dep_alcotest ] |> List.sort_uniq compare
+
 module Dune_project = struct
+  let pp_depend ppf dep =
+    match dep.dep_filter with
+    | None -> Fmt.string ppf dep.dep_name
+    | Some filter -> Fmt.pf ppf "(%s :%s)" dep.dep_name filter
+
   let package c ppf =
-    let dependencies =
-      c.dependencies
-      |> List.append [ "alcotest" ]
-      |> List.sort_uniq String.compare
-    in
     Fmt.pf ppf {|(lang dune %s)
 (name %s)
 (implicit_transitive_deps false)
@@ -35,8 +40,8 @@ module Dune_project = struct
  (documentation https://%s.github.io/%s/)
  (depends %a))|}
       c.name c.project_synopsis c.project_synopsis c.github_organisation c.name
-      Fmt.(list ~sep:(const string " ") string)
-      dependencies
+      Fmt.(list ~sep:(const string " ") pp_depend)
+      (project_dependencies c)
 
   let minimal config ppf = Fmt.pf ppf "(lang dune %s)" config.versions.dune
 end
@@ -198,6 +203,9 @@ let opam config ppf =
     Fmt.pf ppf "git+https://github.com/%s/%s.git" config.github_organisation
       config.name
   in
+  let pp_depend ppf dep =
+    Fmt.pf ppf "%S%a" dep.dep_name Fmt.(option (fmt " {%s}")) dep.dep_filter
+  in
   Fmt.pf ppf
     {|opam-version: "%s"
 maintainer:   "%s"
@@ -216,14 +224,14 @@ build: [
 depends: [
   "ocaml"   {>= "%s"}
   "dune"    {build & >= "%s"}
-  "fmt"
-  "logs"
-  "alcotest" {with-test}
+  @[<v 2>%a@]
 ]
 synopsis: "%s"|}
     config.versions.opam config.maintainer_fullname config.maintainer_fullname
     Config.pp_license config.license pp_homepage config pp_bugreports config
     pp_devrepo config config.versions.ocaml config.versions.dune
+    Fmt.(list ~sep:cut pp_depend)
+    (project_dependencies config)
     config.project_synopsis
 
 let test_main_ml config ppf =
diff --git a/lib/layouts.ml b/lib/layouts.ml
index 3a66692..0e5359c 100644
--- a/lib/layouts.ml
+++ b/lib/layouts.ml
@@ -152,7 +152,7 @@ let binary = { layout = binary; post_init = [] }
 let executable (config : Config.t) =
   let name = config.name in
   let toplevel_file = Utils.Utils_naming.file_of_project name in
-  let libraries = config.dependencies in
+  let libraries = List.map (fun d -> d.Config.dep_name) config.dependencies in
   let open Contents in
   Folder
     ( config.name,
diff --git a/lib/oskel.ml b/lib/oskel.ml
index f86ca00..913157d 100644
--- a/lib/oskel.ml
+++ b/lib/oskel.ml
@@ -180,6 +180,11 @@ let run ~project_kind ?name ?project_synopsis ~maintainer_fullname
              if !progress_bar_active then Printf.printf "\r\n%!";
              return ())
     and+ c = config >* progress in
+    let dependencies =
+      List.map
+        (fun dep_name -> { Config.dep_name; dep_filter = None })
+        dependencies
+    in
     let versions =
       versions
       |> function