diff --git a/CHANGES.md b/CHANGES.md
index 70f66c7..0eab525 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,17 @@
+### v2.0.0 (2019-02-24)
+
+* Major revision of the `RO` signature:
+ - values are of type `string`
+ - keys are segments instead of a string
+ - `read` is now named `get`, and does no longer take an offset and length
+ - the new function `list` is provided
+ - the new functions `last_modified` and `digest` are provided
+* A module `Key` is provided with convenience functions to build keys
+* An `RW` signature is provided, extending `RO` with
+ - a function `set` to replace a value
+ - a function `remove` to remove a key
+ - `batch` to batch operations
+
 ### v1.1.1 (2017-06-29)
 
 * Remove `open Result` statements (and drop support to 4.02)
diff --git a/README.md b/README.md
index c1aefdd..d1e0516 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,16 @@
 ## mirage-kv — MirageOS signatures for key/value devices
 
-mirage-kv provides the [Mirage_kv.RO][ro] and [Mirage_kv_lwt.RO][ro-lwt]
-signatures the MirageOS key/value devices should implement.
+mirage-kv provides the [Mirage_kv.RO][ro] and [Mirage_kv.RW][rw]
+signatures the MirageOS key/value devices should implement. In addition,
+[Mirage_kv_lwt.RO][ro-lwt] and [Mirage_kv_lwt.RW][rw-lwt] are provided where
+`io` is constrained to `Lwt.t` and `value` to `string`.
 
 mirage-kv is distributed under the ISC license.
 
 [ro]: https://mirage.github.io/mirage-kv/mirage-kv/Mirage_kv/module-type-RO/index.html
+[rw]: https://mirage.github.io/mirage-kv/mirage-kv/Mirage_kv/module-type-RW/index.html
 [ro-lwt]: https://mirage.github.io/mirage-kv/mirage-kv-lwt/Mirage_kv_lwt/index.html#module-type-RO
+[rw-lwt]: https://mirage.github.io/mirage-kv/mirage-kv-lwt/Mirage_kv_lwt/index.html#module-type-RW
 
 [![Build Status](https://travis-ci.org/mirage/mirage-kv.svg?branch=master)](https://travis-ci.org/mirage/mirage-kv)
 
diff --git a/mirage-kv-lwt.opam b/mirage-kv-lwt.opam
index ea15420..0b2e8b6 100644
--- a/mirage-kv-lwt.opam
+++ b/mirage-kv-lwt.opam
@@ -1,6 +1,6 @@
 opam-version: "2.0"
 maintainer:   "Thomas Gazagnaire <thomas@gazagnaire.org>"
-authors:      ["Thomas Gazagnaire <thomas@gazagnaire.org>"]
+authors:      ["Thomas Gazagnaire <thomas@gazagnaire.org>" "Stefanie Schirmer" "Hannes Mehnert"]
 homepage:     "https://github.com/mirage/mirage-kv"
 doc:          "https://mirage.github.io/mirage-kv/"
 license:      "ISC"
@@ -14,7 +14,7 @@ build: [
 ]
 
 depends: [
-  "ocaml"     {>= "4.03.0"}
+  "ocaml"     {>= "4.05.0"}
   "dune"      {build}
   "mirage-kv" {>= "1.0.0"}
   "lwt"
@@ -22,3 +22,8 @@ depends: [
 ]
 
 synopsis: "MirageOS signatures for key/value devices"
+description: """
+mirage-kv-lwt provides the `Mirage_kv_lwt.RO` and `Mirage_kv_lwt.RW` signatures,
+which are the corresponding `Mirage_kv` signatures with `io` constrained to
+`Lwt.t` and `value` to `string`.
+"""
diff --git a/mirage-kv.opam b/mirage-kv.opam
index f851b3f..7ea8052 100644
--- a/mirage-kv.opam
+++ b/mirage-kv.opam
@@ -1,6 +1,6 @@
 opam-version: "2.0"
 maintainer:   "Thomas Gazagnaire <thomas@gazagnaire.org>"
-authors:      ["Thomas Gazagnaire <thomas@gazagnaire.org>"]
+authors:      ["Thomas Gazagnaire <thomas@gazagnaire.org>" "Stefanie Schirmer" "Hannes Mehnert"]
 homepage:     "https://github.com/mirage/mirage-kv"
 doc:          "https://mirage.github.io/mirage-kv/"
 license:      "ISC"
@@ -11,15 +11,17 @@ tags:         ["org:mirage"]
 build: [
   ["dune" "subst"] {pinned}
   ["dune" "build" "-p" name "-j" jobs]
-]
-build-test: [
-  ["dune" "runtest" "-p" name]
+  ["dune" "runtest" "-p" name] {with-test}
 ]
 depends: [
   "ocaml" {>= "4.05.0"}
   "dune"     {build}
   "mirage-device" {>= "1.0.0"}
   "fmt"
-  "alcotest" {test}
+  "alcotest" {with-test}
 ]
 synopsis: "MirageOS signatures for key/value devices"
+description: """
+mirage-kv provides the `Mirage_kv.RO` and `Mirage_kv.RW`
+signatures the MirageOS key/value devices should implement.
+"""