diff --git a/sequence.mli b/sequence.mli
index 83f4753..0cf036e 100644
--- a/sequence.mli
+++ b/sequence.mli
@@ -204,13 +204,13 @@ val group : ?eq:('a -> 'a -> bool) -> 'a t -> 'a list t
 val group_succ_by : ?eq:('a -> 'a -> bool) -> 'a t -> 'a list t
 (** Group equal consecutive elements.
     Synonym to {!group}.
-    @since NEXT_RELEASE *)
+    @since 0.6 *)
 
 val group_by : ?hash:('a -> int) -> ?eq:('a -> 'a -> bool) ->
   'a t -> 'a list t
 (** Group equal elements, disregarding their order of appearance.
     The result sequence is traversable as many times as required.
-    @since NEXT_RELEASE *)
+    @since 0.6 *)
 
 val uniq : ?eq:('a -> 'a -> bool) -> 'a t -> 'a t
 (** Remove consecutive duplicate elements. Basically this is