diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87f5dcbe..c05947a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,25 @@
 # Changelog
 
+## 0.9
+
+- add `Float`, `Ref`, `Set`, `Format` to `CCPervasives`
+- `CCRingBuffer.append` (simple implementation)
+- `containers.data` now depends on bytes
+- new `CCRingBuffer` module, imperative deque with batch (blit) operations,
+  mostly done by Carmelo Piccione
+- new `Lwt_pipe` and `Lwt_klist` streams for Lwt, respectively (un)bounded
+  synchronized queues and lazy lists
+- `CCKTree.print`, a simple S-expressions printer for generic trees
+- Add `CCMixmap` in containers.data (close #40), functional alternative to `CCMixtbl`
+- remove old META file
+- simplified `CCTrie` implementation
+- use "compiledObject: best" in `_oasis` for binaries
+- document some invariants in `CCCache` (see #38)
+- tests for `CCCache.lru`
+- fix `CCFormat.seq` combinator
+- add `CCSet` module in core/
+- add `CCRef` module in core/
+
 ## 0.8
 
 - add `@Emm` to authors
diff --git a/_oasis b/_oasis
index b4aa18f5..78f4d98b 100644
--- a/_oasis
+++ b/_oasis
@@ -1,6 +1,6 @@
 OASISFormat: 0.4
 Name:        containers
-Version:     0.8
+Version:     0.9
 Homepage:    https://github.com/c-cube/ocaml-containers
 Authors:     Simon Cruanes
 License:     BSD-2-clause
diff --git a/src/core/CCRef.ml b/src/core/CCRef.ml
index a0f74d70..e3965765 100644
--- a/src/core/CCRef.ml
+++ b/src/core/CCRef.ml
@@ -26,7 +26,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 (** {1 References}
 
-@since NEXT_RELEASE *)
+@since 0.9 *)
 
 type 'a print = Format.formatter -> 'a -> unit
 type 'a pp = Buffer.t -> 'a -> unit
diff --git a/src/core/CCRef.mli b/src/core/CCRef.mli
index e0d74cd6..35694e7e 100644
--- a/src/core/CCRef.mli
+++ b/src/core/CCRef.mli
@@ -25,7 +25,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *)
 
 (** {1 References}
-@since NEXT_RELEASE *)
+@since 0.9 *)
 
 type 'a print = Format.formatter -> 'a -> unit
 type 'a pp = Buffer.t -> 'a -> unit
diff --git a/src/core/CCSet.mli b/src/core/CCSet.mli
index 62bdd9fe..a9b1912a 100644
--- a/src/core/CCSet.mli
+++ b/src/core/CCSet.mli
@@ -26,7 +26,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 (** {1 Wrapper around Set}
 
-@since NEXT_RELEASE *)
+@since 0.9 *)
 
 type 'a sequence = ('a -> unit) -> unit
 type 'a printer = Buffer.t -> 'a -> unit
diff --git a/src/data/CCMixmap.mli b/src/data/CCMixmap.mli
index 3be7ea81..c7adfe68 100644
--- a/src/data/CCMixmap.mli
+++ b/src/data/CCMixmap.mli
@@ -27,7 +27,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 {b status: experimental}
 
-@since NEXT_RELEASE *)
+@since 0.9 *)
 
 type 'a injection
 (** An accessor for values of type 'a in any map. Values put
diff --git a/src/data/CCRingBuffer.mli b/src/data/CCRingBuffer.mli
index c90a07c9..7eadba09 100644
--- a/src/data/CCRingBuffer.mli
+++ b/src/data/CCRingBuffer.mli
@@ -25,7 +25,7 @@
 
     {b status: experimental}
 
-    @since NEXT_RELEASE
+    @since 0.9
 *)
 
 (** {2 Underlying Array} *)
diff --git a/src/iter/CCKTree.mli b/src/iter/CCKTree.mli
index 7b773ef3..30916abf 100644
--- a/src/iter/CCKTree.mli
+++ b/src/iter/CCKTree.mli
@@ -118,7 +118,7 @@ Example (tree of calls for naive Fibonacci function):
 val print : 'a formatter -> 'a t formatter
 (** A pretty-printer using S-expressions and boxes to render the tree.
     Empty nodes are not rendered; sharing is ignored.
-    @since NEXT_RELEASE *)
+    @since 0.9 *)
 
 (** {2 Pretty printing in the DOT (graphviz) format} *)
 
diff --git a/src/lwt/lwt_klist.mli b/src/lwt/lwt_klist.mli
index 2e7ab8ea..abc62b9b 100644
--- a/src/lwt/lwt_klist.mli
+++ b/src/lwt/lwt_klist.mli
@@ -32,7 +32,7 @@ several times, but might eat memory.
 
 {b status: experimental}
 
-@since NEXT_RELEASE *)
+@since 0.9 *)
 
 type 'a t = [ `Nil | `Cons of 'a * 'a t ] Lwt.t
 type 'a stream = 'a t
diff --git a/src/lwt/lwt_pipe.mli b/src/lwt/lwt_pipe.mli
index b9f5dfa5..46702c78 100644
--- a/src/lwt/lwt_pipe.mli
+++ b/src/lwt/lwt_pipe.mli
@@ -52,7 +52,7 @@ Lwt_io.with_file ~mode:Lwt_io.output "/tmp/foo"
 
 {b status: experimental}
 
-@since NEXT_RELEASE
+@since 0.9
 *)
 
 type 'a or_error = [`Ok of 'a | `Error of string]