diff --git a/core/CCArray.mli b/core/CCArray.mli
index a162f28f..e3cf6dac 100644
--- a/core/CCArray.mli
+++ b/core/CCArray.mli
@@ -72,12 +72,12 @@ module type S = sig
 
   val findi : (int -> 'a -> 'b option) -> 'a t -> 'b option
   (** Like {!find}, but also pass the index to the predicate function.
-      @since 0.4 *)
+      @since 0.3.4 *)
 
   val find_idx : ('a -> bool) -> 'a t -> (int * 'a) option
   (** [find p x] returns [Some (i,x)] where [x] is the [i]-th element of [l],
       and [p x] holds. Otherwise returns [None]
-      @since 0.4 *)
+      @since 0.3.4 *)
 
   val lookup : ?cmp:'a ord -> 'a -> 'a t -> int option
   (** Lookup the index of some value in a sorted array.
diff --git a/core/CCList.mli b/core/CCList.mli
index 21e1f63a..6f62288e 100644
--- a/core/CCList.mli
+++ b/core/CCList.mli
@@ -103,7 +103,7 @@ val find : ('a -> 'b option) -> 'a t -> 'b option
 
 val findi : (int -> 'a -> 'b option) -> 'a t -> 'b option
 (** Like {!find}, but also pass the index to the predicate function.
-    @since 0.4 *)
+    @since 0.3.4 *)
 
 val find_idx : ('a -> bool) -> 'a t -> (int * 'a) option
 (** [find p x] returns [Some (i,x)] where [x] is the [i]-th element of [l],
diff --git a/core/CCOpt.mli b/core/CCOpt.mli
index 2e810568..068631fa 100644
--- a/core/CCOpt.mli
+++ b/core/CCOpt.mli
@@ -67,7 +67,7 @@ val filter : ('a -> bool) -> 'a t -> 'a t
 
 val get : 'a -> 'a t -> 'a
 (** [get default x] unwraps [x], but if [x = None] it returns [default] instead.
-    @since 0.5 *)
+    @since 0.4.1 *)
 
 val get_exn : 'a t -> 'a
 (** Open the option, possibly failing if it is [None]
diff --git a/core/CCSequence.mli b/core/CCSequence.mli
index cd4084b3..0c5fa9a6 100644
--- a/core/CCSequence.mli
+++ b/core/CCSequence.mli
@@ -78,25 +78,25 @@ val singleton : 'a -> 'a t
 
 val doubleton : 'a -> 'a -> 'a t
   (** Sequence with exactly two elements
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val cons : 'a -> 'a t -> 'a t
   (** [cons x l] yields [x], then yields from [l].
       Same as [append (singleton x) l]
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 
 val snoc : 'a t -> 'a -> 'a t
   (** Same as {!cons} but yields the element after iterating on [l]
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val return : 'a -> 'a t
   (** Synonym to {!singleton}
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val pure : 'a -> 'a t
   (** Synonym to {!singleton}
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val repeat : 'a -> 'a t
   (** Infinite sequence of the same element. You may want to look
@@ -146,11 +146,11 @@ val exists : ('a -> bool) -> 'a t -> bool
 val mem : ?eq:('a -> 'a -> bool) -> 'a -> 'a t -> bool
   (** Is the value a member of the sequence?
       @param eq the equality predicate to use (default [(=)])
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val find : ('a -> 'b option) -> 'a t -> 'b option
   (** Find the first element on which the function doesn't return [None]
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val length : 'a t -> int
   (** How long is the sequence? Forces the sequence. *)
@@ -179,14 +179,14 @@ val flatMap : ('a -> 'b t) -> 'a t -> 'b t
 
 val flat_map : ('a -> 'b t) -> 'a t -> 'b t
   (** Alias to {!flatMap} with a more explicit name
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val fmap : ('a -> 'b option) -> 'a t -> 'b t
   (** Specialized version of {!flatMap} for options.  *)
 
 val filter_map : ('a -> 'b option) -> 'a t -> 'b t
   (** Alias to {!fmap} with a more explicit name
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val intersperse : 'a -> 'a t -> 'a t
   (** Insert the single element between every element of the sequence *)
@@ -210,7 +210,7 @@ val persistent_lazy : 'a t -> 'a t
       is interrupted prematurely ({!take}, etc.) then [s'] will not be
       memorized, and the next call to [s'] will traverse [s] again.
 
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 (** {2 Misc} *)
 
@@ -237,7 +237,7 @@ val product : 'a t -> 'b t -> ('a * 'b) t
 
 val product2 : 'a t -> 'b t -> ('a, 'b) t2
   (** Binary version of {!product}. Same requirements.
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val join : join_row:('a -> 'b -> 'c option) -> 'a t -> 'b t -> 'c t
   (** [join ~join_row a b] combines every element of [a] with every
@@ -264,12 +264,12 @@ val min : ?lt:('a -> 'a -> bool) -> 'a t -> 'a option
 
 val head : 'a t -> 'a option
   (** First element, if any, otherwise [None]
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val head_exn : 'a t -> 'a
   (** First element, if any, fails
       @raise Invalid_argument if the sequence is empty
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val take : int -> 'a t -> 'a t
   (** Take at most [n] elements from the sequence. Works on infinite
@@ -279,14 +279,14 @@ val take_while : ('a -> bool) -> 'a t -> 'a t
   (** Take elements while they satisfy the predicate, then stops iterating.
       Will work on an infinite sequence [s] if the predicate is false for at
       least one element of [s].
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val drop : int -> 'a t -> 'a t
   (** Drop the [n] first elements of the sequence. Lazy. *)
 
 val drop_while : ('a -> bool) -> 'a t -> 'a t
   (** Predicate version of {!drop}
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val rev : 'a t -> 'a t
   (** Reverse the sequence. O(n) memory and time, needs the
@@ -331,12 +331,12 @@ val of_list : 'a list -> 'a t
 
 val on_list : ('a t -> 'b t) -> 'a list -> 'b list
 (** [on_list f l] is equivalent to [to_list @@ f @@ of_list l].
-    @since 0.4
+    @since 0.3.4
 *)
 
 val to_opt : 'a t -> 'a option
   (** Alias to {!head}
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val to_array : 'a t -> 'a array
   (** Convert to an array. Currently not very efficient because
@@ -355,7 +355,7 @@ val array_slice : 'a array -> int -> int -> 'a t
 
 val of_opt : 'a option -> 'a t
   (** Iterate on 0 or 1 values.
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 val of_stream : 'a Stream.t -> 'a t
   (** Sequence of elements of a stream (usable only once) *)
@@ -404,7 +404,7 @@ val to_str :  char t -> string
 val concat_str : string t -> string
   (** Concatenate strings together, eagerly.
       Also see {!intersperse} to add a separator.
-      @since 0.4 *)
+      @since 0.3.4 *)
 
 exception OneShotSequence
   (** Raised when the user tries to iterate several times on
@@ -457,10 +457,10 @@ module Set : sig
     val to_seq : t -> elt sequence
 
     val to_list : t -> elt list
-      (** @since 0.4 *)
+      (** @since 0.3.4 *)
 
     val of_list : elt list -> t
-      (** @since 0.4 *)
+      (** @since 0.3.4 *)
   end
 
   (** Create an enriched Set module from the given one *)
@@ -481,10 +481,10 @@ module Map : sig
     val values : 'a t -> 'a sequence
 
     val to_list : 'a t -> (key * 'a) list
-      (** @since 0.4 *)
+      (** @since 0.3.4 *)
 
     val of_list : (key * 'a) list -> 'a t
-      (** @since 0.4 *)
+      (** @since 0.3.4 *)
   end
 
   (** Adapt a pre-existing Map module to make it sequence-aware *)
@@ -526,19 +526,19 @@ module Infix : sig
 
   val (>>=) : 'a t -> ('a -> 'b t) -> 'b t
     (** Monadic bind (infix version of {!flat_map}
-        @since 0.4 *)
+        @since 0.3.4 *)
 
   val (>|=) : 'a t -> ('a -> 'b) -> 'b t
     (** Infix version of {!map}
-        @since 0.4 *)
+        @since 0.3.4 *)
 
   val (<*>) : ('a -> 'b) t -> 'a t -> 'b t
     (** Applicative operator (product+application)
-        @since 0.4 *)
+        @since 0.3.4 *)
 
   val (<+>) : 'a t -> 'a t -> 'a t
     (** Concatenation of sequences
-        @since 0.4 *)
+        @since 0.3.4 *)
 end
 
 include module type of Infix
@@ -576,7 +576,7 @@ By chunks of [4096] bytes:
   Sequence.IO.(chunks_of ~size:4096 "a" |> write_to "b");;
 ]}
 
-@since 0.4 *)
+@since 0.3.4 *)
 
 module IO : sig
   val lines_of : ?mode:int -> ?flags:open_flag list ->
diff --git a/core/CCSexp.mli b/core/CCSexp.mli
index 596a08be..09de18e6 100644
--- a/core/CCSexp.mli
+++ b/core/CCSexp.mli
@@ -252,11 +252,11 @@ Sexp.Traverse.list_all pt_of_sexp sexp;;
 module Traverse : sig
   type 'a conv = t -> 'a option
   (** A converter from S-expressions to 'a is a function [sexp -> 'a option].
-      @since 0.5 *)
+      @since 0.4.1 *)
 
   val map_opt : ('a -> 'b option) -> 'a list -> 'b list option
   (** Map over a list, failing as soon as the function fails on any element
-      @since 0.5 *)
+      @since 0.4.1 *)
 
   val list_any : 'a conv -> t -> 'a option
   (** [list_any f (List l)] tries [f x] for every element [x] in [List l],
@@ -284,19 +284,19 @@ module Traverse : sig
   val to_list_with : (t -> 'a option) -> 'a list conv
   (** Expect a list, applies [f] to all the elements of the list, and succeeds
       only if [f] succeeded on every element 
-      @since 0.5 *)
+      @since 0.4.1 *)
 
   val to_pair : (t * t) conv
   (** Expect a list of two elements *)
 
   val to_pair_with : 'a conv -> 'b conv -> ('a * 'b) conv
   (** Same as {!to_pair} but applies conversion functions
-      @since 0.5 *)
+      @since 0.4.1 *)
 
   val to_triple : (t * t * t) conv
 
   val to_triple_with : 'a conv -> 'b conv -> 'c conv -> ('a * 'b * 'c) conv
-      (* @since 0.5 *)
+      (* @since 0.4.1 *)
 
   val get_field : string -> t conv
   (** [get_field name e], when [e = List [(n1,x1); (n2,x2) ... ]], extracts
@@ -314,7 +314,7 @@ module Traverse : sig
   (** [field_list name f  "(... (name a b c d) ...record)"]
       will look for a field based on the given [name], and expect it to have a
       list of arguments dealt with by [f] (here, "a b c d").
-      @since 0.5 *)
+      @since 0.4.1 *)
 
   val (>>=) : 'a option -> ('a -> 'b option) -> 'b option