diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 48fbed9..d4f6f29 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.1.1"
+  ".": "3.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a31d7b1..e709430 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## [3.0.0](https://github.com/structured-world/coordinode-python/compare/v2.1.1...v3.0.0) (2026-09-24)
+
+
+### ⚠ BREAKING CHANGES
+
+* write_concern no longer accepts "w0", "w1", "memory" or "cache"; use 0, 1, or WriteConcern(w=1, journal="memory" | "cache").
+
+### Features
+
+* adopt the CoordiNode v0.6.0 protocol ([#102](https://github.com/structured-world/coordinode-python/issues/102)) ([73e7291](https://github.com/structured-world/coordinode-python/commit/73e7291069abe2d6e31c7bdb081380e0a0375059))
+
 ## [2.1.1](https://github.com/structured-world/coordinode-python/compare/v2.1.0...v2.1.1) (2026-09-05)
 
 
diff --git a/coordinode-embedded/Cargo.toml b/coordinode-embedded/Cargo.toml
index f590ae7..5d69b5d 100644
--- a/coordinode-embedded/Cargo.toml
+++ b/coordinode-embedded/Cargo.toml
@@ -5,7 +5,7 @@ name = "coordinode-embedded"
 # through hatch-vcs. maturin has no equivalent and takes the wheel version from
 # here, so this line has to move with the release or the wheel keeps the name it
 # had last time and PyPI refuses it as a duplicate.
-version = "2.1.1"
+version = "3.0.0"
 edition = "2021"
 rust-version = "1.90"
 description = "CoordiNode embedded Python bindings — in-process graph database, no server required"
diff --git a/pyproject.toml b/pyproject.toml
index 4dda059..0b37c5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@
 
 [project]
 name = "coordinode-workspace"
-version = "2.1.1"
+version = "3.0.0"
 license = { text = "Apache-2.0" }
 authors = [{ name = "Dmitry Prudnikov", email = "mail@polaz.com" }]
 requires-python = ">=3.11"
diff --git a/uv.lock b/uv.lock
index 691bc96..db56e3c 100644
--- a/uv.lock
+++ b/uv.lock
@@ -572,7 +572,7 @@ provides-extras = ["dev"]
 
 [[package]]
 name = "coordinode-workspace"
-version = "2.1.1"
+version = "3.0.0"
 source = { virtual = "." }
 dependencies = [
     { name = "googleapis-common-protos" },