diff --git a/AUDIT.md b/AUDIT.md
index 40fda77..db238ca 100644
--- a/AUDIT.md
+++ b/AUDIT.md
@@ -398,12 +398,12 @@ ruff, 159 offline tests, 28 HA Core tests; the offline tests also pass on Python
 3.9.6. `sh scripts/check.sh` additionally validates packaging, translations and
 the changelog.
 
-## Final stability fixes after 0.4.1 — 2026-10-27
+## 0.4.2 — final stability fixes after 0.4.1 — 2026-10-27
 
 Scope: four issues from an independent review of 0.4.1, plus a user-requested
 *Reset learned model* action. Repository code and tests only (HA Core 2025.12.0
 and 2026.2.3 harness); no HAOS, device or deployment testing. Still no actuator
-code; the static and runtime service-call guards pass. Version unchanged (0.4.1).
+code; the static and runtime service-call guards pass. Released as 0.4.2.
 
 Confirmed issues, root causes and fixes:
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e98135..be29933 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,11 +2,11 @@
 
 Engineering findings and test evidence behind each change are in [AUDIT.md](AUDIT.md).
 
-## Unreleased — final stability fixes after 0.4.1
+## 0.4.2 — 2026-10-27
 
 Four correctness fixes from an independent review of 0.4.1, and a **Reset learned
-model** action you asked for. The version stays 0.4.1 until released. Still
-**observation-only**: no service calls; the boiler and thermostat are untouched.
+model** action. Still **observation-only**: no service calls; the boiler and
+thermostat are untouched.
 Tested in the Home Assistant Core harness with HA 2025.12.0 and 2026.2.3; not on
 HAOS.
 
diff --git a/README.md b/README.md
index f3a4d26..f2bf21c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Heating MPC 0.4.1 — custom integration for Home Assistant OS
+# Heating MPC 0.4.2 — custom integration for Home Assistant OS
 
 **Experimental, observation-only (shadow mode).** It **never** changes the Generic Thermostat, the physical relay, the boiler's setpoint, `heat/off`, or Comfort/Away/Sleep. No Docker add-on, MQTT or InfluxDB connection is needed.
 
diff --git a/ROADMAP.md b/ROADMAP.md
index 2f6e074..4c239d3 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -104,8 +104,8 @@ are now `incomplete`, not scored; window sensors unavailable at startup are
 unknown, with last known states saved and restored as unknown; unload, reload
 and removal can no longer publish stale results or recreate a deleted model;
 Forecast Error scores only forecasts whose plan the relay matched within 2
-minutes. Also added: **Reset learned model** in Configure. Not released or tested
-on HAOS yet.
+minutes. Also added: **Reset learned model** in Configure. Released as 0.4.2; not
+yet tested on HAOS.
 
 ## Milestone 1 — Explainable forecasts and dashboards (target v0.3.0)
 
diff --git a/custom_components/heating_mpc/manifest.json b/custom_components/heating_mpc/manifest.json
index 592680d..e7af5d0 100644
--- a/custom_components/heating_mpc/manifest.json
+++ b/custom_components/heating_mpc/manifest.json
@@ -9,5 +9,5 @@
   "iot_class": "local_polling",
   "requirements": [],
   "single_config_entry": true,
-  "version": "0.4.1"
+  "version": "0.4.2"
 }