diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 816df2d..2537c1f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.1"
+  ".": "0.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69bf803..56b8192 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [0.4.0](https://github.com/amplitude/developer-cli/compare/developer-cli-v0.3.1...developer-cli-v0.4.0) (2026-10-02)
+
+
+### Features
+
+* **heatmaps:** add `amp heatmaps click-map` and `amp heatmaps scroll-map` for click and scroll-depth data on a page URL ([16307f2](https://github.com/amplitude/developer-cli/commit/16307f2bee010c38ce2c239d6b90b024829f46c2))
+* **zoning:** add `amp zoning zone-metrics` for per-zone engagement metrics on a page URL ([16307f2](https://github.com/amplitude/developer-cli/commit/16307f2bee010c38ce2c239d6b90b024829f46c2))
+* **skills:** `amp skills get --save` writes a skill document to a local directory ([16307f2](https://github.com/amplitude/developer-cli/commit/16307f2bee010c38ce2c239d6b90b024829f46c2))
+
+
+### Bug Fixes
+
+* **help:** `--help --json` now expands multi-level command prefixes, and `amp help auth --json` lists `logout` again ([16307f2](https://github.com/amplitude/developer-cli/commit/16307f2bee010c38ce2c239d6b90b024829f46c2))
+
 ## [0.3.1](https://github.com/amplitude/developer-cli/compare/developer-cli-v0.3.0...developer-cli-v0.3.1) (2026-09-22)
 
 
diff --git a/package.json b/package.json
index 15952ff..2fbcd8b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@amplitude/developer-cli",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "amp CLI and developer artifacts for managing Amplitude platform primitives via the Developer API",
   "type": "commonjs",
   "license": "MIT",