diff --git a/CHANGES.md b/CHANGES.md
index 65a44ea..d7e6a2e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,18 @@
 
+## 3.1
+
+- Expose one-of per-constructor options
+- Support options for enum values
+- expose server stubs for advanced users
+
+- fix: only generate services from the current file
+- silence warning 44 in generated code
+- Use generated encoders/decoders for empty messages in rpc
+
+breaking:
+
+- remove bs runtime, we don't support it going forward
+
 ## 3.0.2
 
 - fix segfault in pbrt in bytecode
diff --git a/dune-project b/dune-project
index cc63450..669ebdf 100644
--- a/dune-project
+++ b/dune-project
@@ -1,7 +1,7 @@
 (lang dune 2.0)
 (name ocaml-protoc)
 (generate_opam_files true)
-(version 3.0.2)
+(version 3.1)
 
 (maintainers "Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes")
 (authors "Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes")
diff --git a/ocaml-protoc.opam b/ocaml-protoc.opam
index 423220e..43f5bfc 100644
--- a/ocaml-protoc.opam
+++ b/ocaml-protoc.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "3.0.2"
+version: "3.1"
 synopsis: "Pure OCaml compiler for .proto files"
 maintainer: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]
 authors: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]
diff --git a/pbrt.opam b/pbrt.opam
index 1655cc8..7e55725 100644
--- a/pbrt.opam
+++ b/pbrt.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "3.0.2"
+version: "3.1"
 synopsis: "Runtime library for Protobuf tooling"
 maintainer: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]
 authors: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]
diff --git a/pbrt_services.opam b/pbrt_services.opam
index 684c057..03985ae 100644
--- a/pbrt_services.opam
+++ b/pbrt_services.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "3.0.2"
+version: "3.1"
 synopsis: "Runtime library for ocaml-protoc to support RPC services"
 maintainer: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]
 authors: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]
diff --git a/pbrt_yojson.opam b/pbrt_yojson.opam
index f163f3f..815b7e3 100644
--- a/pbrt_yojson.opam
+++ b/pbrt_yojson.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "3.0.2"
+version: "3.1"
 synopsis:
   "Runtime library for ocaml-protoc to support JSON encoding/decoding"
 maintainer: ["Maxime Ransan <maxime.ransan@gmail.com>" "Simon Cruanes"]