diff --git a/.travis.yml b/.travis.yml
index dde8c4ab85..8131324279 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ env:
   global:
   - ALCOTEST_SHOW_ERRORS=1
   - REVDEPS="irmin-indexeddb"
-  - PINS="irmin.dev:. irmin-mem.dev:. irmin-fs.dev:. irmin-http.dev:. irmin-git.dev:. irmin-mirage.dev:. irmin-unix.dev:. git.dev:--dev git-http.dev:--dev git-mirage.dev:--dev git-unix.dev:--dev"
+  - PINS="irmin.dev:. irmin-mem.dev:. irmin-fs.dev:. irmin-http.dev:. irmin-git.dev:. irmin-mirage.dev:. irmin-unix.dev:."
   matrix:
   - OCAML_VERSION=4.03 PACKAGE="irmin-fs.dev" TESTS=true
   - OCAML_VERSION=4.04 PACKAGE="irmin-mem.dev" TESTS=true
diff --git a/CHANGES.md b/CHANGES.md
index db30d0581e..1a5e8b8734 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,35 @@
+### 1.2.0 (2017-06-06)
+
+This release changes the build system to use
+[jbuilder](https://github.com/janestreet/jbuilder). By doing so, it introduces
+two new packages: `irmin-mem` and `irmin-fs` -- containing `Irmin_mem` and
+`Irmin_fs` respectively. That release also fixes a bunch of regressions
+introduced in the big 1.0 rewrite.
+
+**all**
+
+- Use `jbuilder` (#444, @samoht)
+- Use mtime 1.0 (#445, @samoht)
+
+**irmin**
+
+- Fix `Irmin.Contents.Cstruct`: pretty-print the raw contents, not the hexdump
+  (#442, @samoht)
+- `Irmin.Hash.X.of_string` should not raise an exception on invalid hash
+  (#443, @samoht)
+
+**irmin-mem**
+
+- New package! Use it if you want to use the `Irmin_mem` module.
+
+**irmin-fs**
+
+- New package! Use it if you want to use the `Irmin_fs` module.
+
+**irmin-git**
+
+- Fix watches (#446, @samoht)
+
 ### 1.1.0 (2017-04-24)
 
 **irmin**
diff --git a/irmin-git.opam b/irmin-git.opam
index 4e189ed282..21a72b99c7 100644
--- a/irmin-git.opam
+++ b/irmin-git.opam
@@ -12,10 +12,10 @@ build-test: ["jbuilder" "runtest" "test/irmin-git"]
 
 depends: [
   "jbuilder" {build}
-  "irmin"    {>= "1.1.0"}
-  "git"      {>= "1.10.0"}
+  "irmin"    {>= "1.2.0"}
+  "git"      {>= "1.11.0"}
   "alcotest" {test}
-  "git-unix" {test & >= "1.10.0"}
+  "git-unix" {test & >= "1.11.0"}
   "mtime"    {test & >= "1.0.0"}
 ]
 
diff --git a/irmin-http.opam b/irmin-http.opam
index 4ee049fd44..adf085d668 100644
--- a/irmin-http.opam
+++ b/irmin-http.opam
@@ -14,9 +14,9 @@ depends: [
   "jbuilder" {build}
   "crunch"
   "webmachine" {>= "0.3.2"}
-  "irmin"  {>= "1.0.0"}
+  "irmin"  {>= "1.2.0"}
   "cohttp" {>= "0.18.3"}
-  "irmin-git" {test & >= "1.0.0"}
+  "irmin-git" {test & >= "1.2.0"}
   "alcotest"  {test}
   "mtime"     {test & >= "1.0.0"}
 ]
diff --git a/irmin-mirage.opam b/irmin-mirage.opam
index 12fcce5d07..aaef27ee38 100644
--- a/irmin-mirage.opam
+++ b/irmin-mirage.opam
@@ -10,10 +10,10 @@ build: ["jbuilder" "build" "-p" name "-j" jobs]
 
 depends: [
   "jbuilder"   {build}
-  "irmin"      {>= "1.1.0"}
-  "irmin-git"  {>= "1.1.0"}
+  "irmin"      {>= "1.2.0"}
+  "irmin-git"  {>= "1.2.0"}
   "irmin-mem"  {>= "1.2.0"}
-  "git-mirage" {>= "1.10.0"}
+  "git-mirage" {>= "1.11.0"}
   "ptime"
   "mirage-kv-lwt"
   "mirage-clock"
diff --git a/irmin-unix.opam b/irmin-unix.opam
index 89419f722b..1c83bdd856 100644
--- a/irmin-unix.opam
+++ b/irmin-unix.opam
@@ -12,13 +12,13 @@ build-test: ["jbuilder" "runtest" "test/irmin-unix"]
 
 depends: [
   "jbuilder"   {build}
-  "irmin"      {>= "1.1.0"}
-  "irmin-git"  {>= "1.1.0"}
-  "irmin-http" {>= "1.1.0"}
+  "irmin"      {>= "1.2.0"}
+  "irmin-git"  {>= "1.2.0"}
+  "irmin-http" {>= "1.2.0"}
   "irmin-fs"   {>= "1.2.0"}
-  "git-unix"   {>= "1.10.0"}
+  "git-unix"   {>= "1.11.0"}
   "irmin-watcher" {>= "0.2.0"}
-  "irmin-mirage" {test & >= "1.0.0"}
+  "irmin-mirage" {test & >= "1.2.0"}
   "alcotest"     {test}
   "mtime"        {test & >= "1.0.0"}
 ]