diff --git a/src/core/collector.ml b/src/core/collector.ml
index e10482c..0b7deaf 100644
--- a/src/core/collector.ml
+++ b/src/core/collector.ml
@@ -55,12 +55,12 @@ module type S = sig
 
   val add_data_to_span : span -> (string * user_data) list -> unit
   (** @since Adds data to the current span.
-      NEXT_RELEASE *)
+      0.4 *)
 
   val add_data_to_manual_span :
     explicit_span -> (string * user_data) list -> unit
   (** Adds data to the given span.
-      @since NEXT_RELEASE *)
+      @since 0.4 *)
 
   val message : ?span:span -> data:(string * user_data) list -> string -> unit
   (** Emit a message with associated metadata. *)
diff --git a/src/core/trace_core.mli b/src/core/trace_core.mli
index e4fe0f3..42c287a 100644
--- a/src/core/trace_core.mli
+++ b/src/core/trace_core.mli
@@ -37,7 +37,7 @@ val with_span :
 val add_data_to_span : span -> (string * user_data) list -> unit
 (** Add structured data to the given active span (see {!with_span}).
     Behavior is not specified if the span has been exited.
-    @since NEXT_RELEASE *)
+    @since 0.4 *)
 
 val enter_manual_sub_span :
   parent:explicit_span ->
@@ -83,7 +83,7 @@ val exit_manual_span : explicit_span -> unit
 val add_data_to_manual_span : explicit_span -> (string * user_data) list -> unit
 (** [add_data_explicit esp data] adds [data] to the span [esp].
       The behavior is not specified is the span has been exited already.
-    @since NEXT_RELEASE *)
+    @since 0.4 *)
 
 val message :
   ?span:span -> ?data:(unit -> (string * user_data) list) -> string -> unit
@@ -114,12 +114,12 @@ val counter_int :
   ?data:(unit -> (string * user_data) list) -> string -> int -> unit
 (** Emit a counter of type [int]. Counters represent the evolution of some quantity
     over time.
-    @param data metadata for this metric (since NEXT_RELEASE) *)
+    @param data metadata for this metric (since 0.4) *)
 
 val counter_float :
   ?data:(unit -> (string * user_data) list) -> string -> float -> unit
 (** Emit a counter of type [float]. See {!counter_int} for more details.
-    @param data metadata for this metric (since NEXT_RELEASE) *)
+    @param data metadata for this metric (since 0.4) *)
 
 (** {2 Collector} *)