diff --git a/CHANGELOG.md b/CHANGELOG.md
index 98aa4b1..882f8b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,12 +1,10 @@
 # Changelog
 
-## 0.3.1 - 2026-05-03
+## 0.4.0 - Unreleased
 
 ### Added
 
 - Added static SSH macOS and Windows targets with `--target macos|windows`, `--windows-mode normal|wsl2`, and config/env support for reusable hosts.
-- Added `actions.fields` config support so repository-specific workflow inputs are sent on every Actions hydration, with CLI `-f key=value` overrides. Thanks @vincentkoc.
-- Added a command-doc drift check to `npm run docs:check` so every top-level CLI command has a matching command page and index entry. Thanks @stainlu.
 
 ### Changed
 
@@ -14,11 +12,21 @@
 
 ### Fixed
 
+- Made Blacksmith live smoke explicit opt-in so the default live smoke works in repositories without a Testbox workflow.
+
+## 0.3.1 - 2026-05-03
+
+### Added
+
+- Added `actions.fields` config support so repository-specific workflow inputs are sent on every Actions hydration, with CLI `-f key=value` overrides. Thanks @vincentkoc.
+- Added a command-doc drift check to `npm run docs:check` so every top-level CLI command has a matching command page and index entry. Thanks @stainlu.
+
+### Fixed
+
 - Deferred run-history creation against legacy coordinators until a lease is known, avoiding noisy `invalid_lease_id` failures before command execution. Thanks @vincentkoc.
 - Suppressed repeated run-event append warnings when a legacy coordinator does not support the newer run-event path. Thanks @vincentkoc.
 - Fixed recorded run logs so long noisy commands are stored in bounded chunks instead of losing the failure evidence between the first output events and the final tail.
 - Forced SSH to use Crabbox's per-lease identity file so local SSH-agent keys cannot exhaust server auth attempts before the runner key is tried.
-- Made Blacksmith live smoke explicit opt-in so the default live smoke works in repositories without a Testbox workflow.
 
 ## 0.3.0 - 2026-05-02
 
diff --git a/README.md b/README.md
index 01ba10b..48f5766 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ No Homebrew? Grab a [GoReleaser archive](https://github.com/openclaw/crabbox/rel
 Prerequisites on the laptop: `git`, `ssh`, `ssh-keygen`, `rsync`, `curl`.
 
 Current stable release: [v0.3.1](https://github.com/openclaw/crabbox/releases/tag/v0.3.1).
+Current development line: `0.4.0` (unreleased).
 
 ## Quick start
 
diff --git a/internal/cli/version.go b/internal/cli/version.go
index 6182dd0..a155b2c 100644
--- a/internal/cli/version.go
+++ b/internal/cli/version.go
@@ -1,3 +1,3 @@
 package cli
 
-var version = "0.2.0"
+var version = "0.4.0-unreleased"
diff --git a/package.json b/package.json
index be7d493..8f0c9be 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openclaw/crabbox-plugin",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "OpenClaw plugin for running Crabbox remote testbox workflows",
   "license": "MIT",
   "type": "module",
diff --git a/worker/package-lock.json b/worker/package-lock.json
index f1946d3..03ecb36 100644
--- a/worker/package-lock.json
+++ b/worker/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@openclaw/crabbox-worker",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@openclaw/crabbox-worker",
-      "version": "0.3.1",
+      "version": "0.4.0",
       "dependencies": {
         "aws4fetch": "^1.0.20",
         "fast-xml-parser": "^5.7.2"
diff --git a/worker/package.json b/worker/package.json
index 899f8b7..7e794b0 100644
--- a/worker/package.json
+++ b/worker/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openclaw/crabbox-worker",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "private": true,
   "type": "module",
   "scripts": {