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+# Helm Upgrade from v1.0.x to v1.1.x
+
+## Topics
+
+- **[Overview](#overview)**
+- **[Features](#features)**
+  - [1. Application version bump to 1.2.0](#1-application-version-bump-to-120)
+  - [2. br-spb-bc-correios sibling image tag pinned](#2-br-spb-bc-correios-sibling-image-tag-pinned)
+- **[Configuration Changes](#configuration-changes)**
+- **[Migration Steps](#migration-steps)**
+- **[Preview changes before upgrading](#preview-changes-before-upgrading)**
+- **[Command to upgrade](#command-to-upgrade)**
+
+## Overview
+
+This is a minor release that updates the application version of the BC Correios plugin and pins the image tag of the `br-spb-bc-correios` sibling component. No breaking changes are introduced and no manual data migration is required.
+
+## Features
+
+### 1. Application version bump to 1.2.0
+
+The chart now ships with `appVersion` `1.2.0`, replacing the previous `1.0.0`. The chart version itself moves from `1.0.1` to `1.1.0-beta.1`.
+
+| Component   | v1.0.1  | v1.1.0-beta.1   |
+|-------------|---------|-----------------|
+| version     | 1.0.1   | 1.1.0-beta.1    |
+| appVersion  | 1.0.0   | 1.2.0           |
+
+The `bc-correios.image.tag` value in `values.yaml` still defaults to `"1.0.0"`. The runtime image tag is rendered by the CI/CD pipeline through the existing `helm_values_key_mappings` declared in `values.yaml`:
+
+```yaml
+# helm_values_key_mappings: '{"plugin-bc-correios": "bc-correios"}'
+```
+
+If you set `bc-correios.image.tag` explicitly in your overrides, align it with the new `appVersion`:
+
+```yaml
+bc-correios:
+  image:
+    repository: lerianstudio/plugin-bc-correios
+    tag: "1.2.0"
+```
+
+> **Note:** For application-level changes included in version 1.2.0, refer to the [plugin-bc-correios changelog](https://github.com/LerianStudio/plugin-bc-correios).
+
+### 2. br-spb-bc-correios sibling image tag pinned
+
+A new top-level `br-spb-bc-correios` block is added to `values.yaml`, pinning the image tag of the sibling SPB BC Correios component to `1.2.0`.
+
+| Component                      | v1.0.1  | v1.1.0-beta.1 |
+|--------------------------------|---------|---------------|
+| br-spb-bc-correios.image.tag   | _unset_ | 1.2.0         |
+
+```yaml
+br-spb-bc-correios:
+  image:
+    tag: 1.2.0
+```
+
+If you already override this value, review your override against the new chart default. No other keys are introduced.
+
+## Configuration Changes
+
+No keys are removed or renamed in this release. The following table summarizes the value changes:
+
+| Setting                      | v1.0.1  | v1.1.0-beta.1 |
+|------------------------------|---------|---------------|
+| Chart `version`              | 1.0.1   | 1.1.0-beta.1  |
+| Chart `appVersion`           | 1.0.0   | 1.2.0         |
+| `br-spb-bc-correios.image.tag` | _unset_ | 1.2.0       |
+
+All existing `values.yaml` settings remain compatible with version 1.1.0-beta.1.
+
+## Migration Steps
+
+This upgrade requires no manual migration steps. The Helm upgrade will roll the pods with the new image tags.
+
+**Recommended upgrade process:**
+
+1. Review the changes using the helm-diff plugin (see [Preview changes before upgrading](#preview-changes-before-upgrading))
+2. Ensure you have a recent backup of your data (if using chart-managed databases)
+3. Run the upgrade command during a maintenance window
+4. Verify all pods are running and healthy after the upgrade
+
+```bash
+kubectl get pods -n <namespace>
+```
+
+5. Check service logs for any startup issues
+
+```bash
+kubectl logs -n <namespace> -l app.kubernetes.io/name=plugin-bc-correios-helm --tail=50
+```
+
+> **Note:** The upgrade will trigger a rolling restart of the BC Correios pods. Depending on your replica count and readiness probe configuration, this may cause brief service interruptions.
+
+## Preview changes before upgrading
+
+```bash
+helm diff upgrade plugin-bc-correios oci://registry-1.docker.io/lerianstudio/plugin-bc-correios-helm --version 1.1.0-beta.1 -n <namespace>
+```
+
+> **Note:** Requires the [helm-diff plugin](https://github.com/databus23/helm-diff). Install with: `helm plugin install https://github.com/databus23/helm-diff`
+
+## Command to upgrade
+
+```bash
+helm upgrade plugin-bc-correios oci://registry-1.docker.io/lerianstudio/plugin-bc-correios-helm --version 1.1.0-beta.1 -n <namespace>
+```