diff --git a/CHANGES.md b/CHANGES.md
index bfb70f15..ac180129 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,12 @@
+
+## 0.8
+
+- feat: add dep on `hmap`, add standard keys to carry around a span context or trace id
+- add semantic conventions for code and HTTP
+
+- better debug message in curl backend
+- make otel-trace a bit more lightweight
+
 ## 0.7
 
 - add Span_link.of_span_ctx, Scope.to_span_ctx, dummy values
diff --git a/dune-project b/dune-project
index 63684022..7f3b0d62 100644
--- a/dune-project
+++ b/dune-project
@@ -7,7 +7,7 @@
 (source
  (github imandra-ai/ocaml-opentelemetry))
 
-(version 0.7)
+(version 0.8)
 
 (authors "the Imandra team and contributors")
 
diff --git a/opentelemetry-client-cohttp-lwt.opam b/opentelemetry-client-cohttp-lwt.opam
index c2cb3305..af2c7fa6 100644
--- a/opentelemetry-client-cohttp-lwt.opam
+++ b/opentelemetry-client-cohttp-lwt.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.7"
+version: "0.8"
 synopsis: "Collector client for opentelemetry, using cohttp + lwt"
 maintainer: [
   "Simon Cruanes <simon.cruanes.2007@m4x.org>"
diff --git a/opentelemetry-client-ocurl.opam b/opentelemetry-client-ocurl.opam
index 4070a5c0..157bf1d5 100644
--- a/opentelemetry-client-ocurl.opam
+++ b/opentelemetry-client-ocurl.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.7"
+version: "0.8"
 synopsis: "Collector client for opentelemetry, using http + ezcurl"
 maintainer: [
   "Simon Cruanes <simon.cruanes.2007@m4x.org>"
diff --git a/opentelemetry-cohttp-lwt.opam b/opentelemetry-cohttp-lwt.opam
index ed7950c8..e4850760 100644
--- a/opentelemetry-cohttp-lwt.opam
+++ b/opentelemetry-cohttp-lwt.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.7"
+version: "0.8"
 synopsis: "Opentelemetry tracing for Cohttp HTTP servers"
 maintainer: [
   "Simon Cruanes <simon.cruanes.2007@m4x.org>"
diff --git a/opentelemetry-lwt.opam b/opentelemetry-lwt.opam
index 82bae68c..fe4d4e18 100644
--- a/opentelemetry-lwt.opam
+++ b/opentelemetry-lwt.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.7"
+version: "0.8"
 synopsis: "Lwt-compatible instrumentation for https://opentelemetry.io"
 maintainer: [
   "Simon Cruanes <simon.cruanes.2007@m4x.org>"
diff --git a/opentelemetry.opam b/opentelemetry.opam
index 756e1860..0c19d367 100644
--- a/opentelemetry.opam
+++ b/opentelemetry.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.7"
+version: "0.8"
 synopsis: "Instrumentation for https://opentelemetry.io"
 maintainer: [
   "Simon Cruanes <simon.cruanes.2007@m4x.org>"
diff --git a/src/core/opentelemetry.ml b/src/core/opentelemetry.ml
index 75d9765f..84cdd0ae 100644
--- a/src/core/opentelemetry.ml
+++ b/src/core/opentelemetry.ml
@@ -328,7 +328,7 @@ end
 
 (** Hmap key to carry around a {!Trace_id.t}, to remember what the current
     trace is.
-    @since NEXT_RELEASE *)
+    @since 0.8 *)
 let k_trace_id : Trace_id.t Hmap.key = Hmap.Key.create ()
 
 (** Unique ID of a span. *)
@@ -486,7 +486,7 @@ end
 
 (** Hmap key to carry around a {!Span_ctx.t}, e.g. to remember what the current
     parent span is.
-    @since NEXT_RELEASE *)
+    @since 0.8 *)
 let k_span_ctx : Span_ctx.t Hmap.key = Hmap.Key.create ()
 
 (** {2 Attributes and conventions} *)