diff --git a/_oasis b/_oasis
index f76776a2..0ba9e705 100644
--- a/_oasis
+++ b/_oasis
@@ -1,6 +1,6 @@
 OASISFormat: 0.4
 Name:        containers
-Version:     dev
+Version:     0.6
 Homepage:    https://github.com/c-cube/ocaml-containers
 Authors:     Simon Cruanes
 License:     BSD-2-clause
diff --git a/core/CCCache.mli b/core/CCCache.mli
index a50b8ee6..33533aa1 100644
--- a/core/CCCache.mli
+++ b/core/CCCache.mli
@@ -27,7 +27,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 Particularly useful for memoization. See {!with_cache} and {!with_cache_rec}
 for more details.
-@since NEXT_RELEASE *)
+@since 0.6 *)
 
 type 'a equal = 'a -> 'a -> bool
 type 'a hash = 'a -> int
@@ -46,7 +46,7 @@ f' 1;;  (* prints *)
 f' 0;;  (* doesn't print, returns cached value *)
 ]}
 
-@since NEXT_RELEASE *)
+@since 0.6 *)
 
 type ('a, 'b) t
 
diff --git a/core/CCFun.mli b/core/CCFun.mli
index 2d7ab372..1a371705 100644
--- a/core/CCFun.mli
+++ b/core/CCFun.mli
@@ -36,7 +36,7 @@ val compose_binop : ('a -> 'b) -> ('b -> 'b -> 'c) -> 'a -> 'a -> 'c
 (** [compose_binop f g] is [fun x y -> g (f x) (f y)]
     Example (partial order):
       [List.sort (compose_binop fst CCInt.compare) [1, true; 2, false; 1, false]]
-    @since NEXT_RELEASE*)
+    @since 0.6*)
 
 val (%>) : ('a -> 'b) -> ('b -> 'c) -> 'a -> 'c
 (** Alias to [compose] *)
diff --git a/core/CCIO.mli b/core/CCIO.mli
index 3e18f3e9..1e29f134 100644
--- a/core/CCIO.mli
+++ b/core/CCIO.mli
@@ -31,7 +31,7 @@ way. For advanced IO tasks, the user is advised to use something
 like Lwt or Async, that are far more comprehensive.
 This module depends on {!CCGen}.
 
-@since NEXT_RELEASE
+@since 0.6
 
 {b NOTE} this was formerly a monadic IO module. The old module is now
 in [containers.advanced] under the name [CCMonadIO].
diff --git a/core/CCList.mli b/core/CCList.mli
index f00c2af3..21e1f63a 100644
--- a/core/CCList.mli
+++ b/core/CCList.mli
@@ -50,7 +50,7 @@ val fold_right : ('a -> 'b -> 'b) -> 'a t -> 'b -> 'b
 
 val init : int -> (int -> 'a) -> 'a t
 (** Same as [Array.init]
-    @since NEXT_RELEASE *)
+    @since 0.6 *)
 
 val compare : ('a -> 'a -> int) -> 'a t -> 'a t -> int
 
diff --git a/core/CCMultiSet.mli b/core/CCMultiSet.mli
index 826f394b..a6574d4a 100644
--- a/core/CCMultiSet.mli
+++ b/core/CCMultiSet.mli
@@ -48,19 +48,19 @@ module type S = sig
   val add_mult : t -> elt -> int -> t
   (** [add_mult set x n] adds [n] occurrences of [x] to [set]
       @raise Invalid_argument if [n < 0]
-      @since NEXT_RELEASE *)
+      @since 0.6 *)
 
   val remove_mult : t -> elt -> int -> t
   (** [remove_mult set x n] removes at most [n] occurrences of [x] from [set]
       @raise Invalid_argument if [n < 0]
-      @since NEXT_RELEASE *)
+      @since 0.6 *)
 
   val update : t -> elt -> (int -> int) -> t
   (** [update set x f] calls [f n] where [n] is the current multiplicity
       of [x] in [set] ([0] to indicate its absence); the result of [f n]
       is the new multiplicity of [x].
       @raise Invalid_argument if [f n < 0]
-      @since NEXT_RELEASE *)
+      @since 0.6 *)
 
   val min : t -> elt
   (** Minimal element w.r.t the total ordering on elements *)
diff --git a/core/CCVector.mli b/core/CCVector.mli
index 94a312fb..e9362f75 100644
--- a/core/CCVector.mli
+++ b/core/CCVector.mli
@@ -101,12 +101,12 @@ val pop_exn : ('a, rw) t -> 'a
 
 val top : ('a, _) t -> 'a option
 (** Top element, if present
-    @since NEXT_RELEASE *)
+    @since 0.6 *)
 
 val top_exn : ('a, _) t -> 'a
 (** Top element, if present
     @raise Failure on an empty vector
-    @since NEXT_RELEASE *)
+    @since 0.6 *)
 
 val copy : ('a,_) t -> ('a,'mut) t
 (** Shallow copy (may give an immutable or mutable vector) *)
diff --git a/misc/mixtbl.mli b/misc/mixtbl.mli
index 6e714c64..650c0ab6 100644
--- a/misc/mixtbl.mli
+++ b/misc/mixtbl.mli
@@ -52,7 +52,7 @@ OUnit.assert_equal None (Mixtbl.get inj_int tbl "a");;
 OUnit.assert_equal (Some "Bye") (Mixtbl.get inj_string tbl "a");;
 ]}
 
-@since NEXT_RELEASE *)
+@since 0.6 *)
 
 type 'a t
 (** A hash table containing values of different types.