diff --git a/CHANGES.md b/CHANGES.md
index 4af1f4a7..01c9209f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,10 @@
 
+## 0.3
+
+- improve error reporting from ocurl exporter
+- improve GC sample collection
+- feat(ocurl): simpler, cleaner backend implementation, with graceful exit
+- config: make `Config.t` private (breaking)
 
 ## 0.2
 
diff --git a/dune-project b/dune-project
index de97f346..544ea3ca 100644
--- a/dune-project
+++ b/dune-project
@@ -4,7 +4,7 @@
 (source
  (github aestheticintegration/ocaml-opentelemetry))
 
-(version 0.2)
+(version 0.3)
 
 (authors "the Imandra team and contributors")
 (maintainers "the Imandra team and contributors")
diff --git a/opentelemetry-client-ocurl.opam b/opentelemetry-client-ocurl.opam
index 124e9b49..8dff25d9 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: "0.2"
+version: "0.3"
 synopsis: "Collector client for opentelemetry, using http + ocurl"
 maintainer: ["the Imandra team and contributors"]
 authors: ["the Imandra team and contributors"]
diff --git a/opentelemetry-cohttp-lwt.opam b/opentelemetry-cohttp-lwt.opam
index b882cdaa..112c5d36 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: "0.2"
+version: "0.3"
 synopsis: "Opentelemetry tracing for Cohttp HTTP servers"
 maintainer: ["the Imandra team and contributors"]
 authors: ["the Imandra team and contributors"]
diff --git a/opentelemetry-lwt.opam b/opentelemetry-lwt.opam
index 80663615..98a095bc 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: "0.2"
+version: "0.3"
 synopsis: "Lwt-compatible instrumentation for https://opentelemetry.io"
 maintainer: ["the Imandra team and contributors"]
 authors: ["the Imandra team and contributors"]
diff --git a/opentelemetry.opam b/opentelemetry.opam
index ca6e802e..b530dee1 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: "0.2"
+version: "0.3"
 synopsis: "Instrumentation for https://opentelemetry.io"
 maintainer: ["the Imandra team and contributors"]
 authors: ["the Imandra team and contributors"]