> For the complete documentation index, see [llms.txt](https://help.sleuth.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sleuth.io/sleuth-dora/modeling-your-deployments/code-deployments/deployment-locking.md).

# Deployment locking

The Lock feature in Sleuth prevents pull requests from merging into deployment branches, and generates automatic notifications via your [Slack](/sleuth-dora/integrations-1/slack.md) channel.

![](https://2832637360-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M1bR_-Od0islbiOl4G0%2Fuploads%2Fgit-blob-8187d86e590d6aa8835de6767b4b91751474e555%2FSleuth%20-%20Sleuth%202021-01-31%2013-41-32.png?alt=media)

#### Manual locking

You can manually lock a deployment or all deployments within a project with one click of a button from your dashboards. You can view your lock history so you can learn how frequently your team locks their deploys and why.

![](https://2832637360-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M1bR_-Od0islbiOl4G0%2Fuploads%2Fgit-blob-1e43ab1a72455944b2e8a03e7705cd99d900780d%2Fsleuth%20lock%20history%20-%20Sleuth%202021-01-31%2021-16-27.png?alt=media)

#### Automatic locking

You can also configure Sleuth to auto-lock deployments [when PRs are merged for the deployment branch](https://help.sleuth.io/settings/project/code-deployments#automatically-lock-deployments).

Read Sleuth CTO [Don Brown's blog post](https://www.sleuth.io/post/prevent-unwanted-changes-with-sleuth-deployment-locking) on how Sleuth's locking feature can make your DevOps life easier!

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