diff --git a/git-kv.opam b/git-kv.opam
index 1c241ac..eba381c 100644
--- a/git-kv.opam
+++ b/git-kv.opam
@@ -12,8 +12,8 @@ depends: [
   "dune"              {>= "2.9.0"}
   "git"               {>= "3.10.0"}
   "mirage-kv"         {>= "6.0.0"}
-  "carton"            {>= "0.6.0"}
-  "carton-lwt"        {>= "0.6.0"}
+  "carton"            {>= "0.7.0"}
+  "carton-lwt"        {>= "0.7.0"}
   "fmt"               {>= "0.8.7"}
   "mirage-clock"      {>= "2.0.0"}
   "ptime"
@@ -28,8 +28,3 @@ build: [
   ["dune" "build" "-p" name "-j" jobs]
   ["dune" "runtest" "-p" name "-j" jobs] {with-test}
 ]
-
-pin-depends: [
-  [ "carton.dev" "git+https://github.com/mirage/ocaml-git.git#98e15fda0b3f0d51fa215a56ffee808a83849765" ]
-  [ "carton-lwt.dev" "git+https://github.com/mirage/ocaml-git.git#98e15fda0b3f0d51fa215a56ffee808a83849765" ]
-]
diff --git a/src/git_kv.mli b/src/git_kv.mli
index b58d9d9..2a72f53 100644
--- a/src/git_kv.mli
+++ b/src/git_kv.mli
@@ -46,7 +46,7 @@ val branch : t -> Git.Reference.t
 val to_octets : ?level:int -> t -> string Lwt.t
 (** [to_octets ?level store] returns a serialized version of the given [store].
     [level] is the {i zlib} level compression used for Git object (between [0]
-    and [9] including). *)
+    and [9] including), defaults to [4]. *)
 
 val of_octets : Mimic.ctx -> remote:string -> string ->
   (t, [> `Msg of string]) result Lwt.t