Why Regular Dependency Updates Are a Security Practice

Most developers have postponed an update at some point, and when that update is for a dependency in your codebase, delaying it can compound risk rather than eliminate it. Even when a new version of a package doesn't fix a known vulnerability, staying current is still a security measure in its own right.

Patches Are Only Built for the Latest Versions

Security patches are typically released only for the latest version, or the currently supported versions, of a project. Backporting patches to older releases is uncommon, even for severe vulnerabilities, because each backport requires maintainers to verify that the patch works and introduces no regressions. In some cases, a patch simply cannot be applied to an older version at all—breaking changes may be necessary to close a serious hole, forcing an upgrade as the only path to protection.

For enterprises that must validate every component and update before deployment, that process should happen on a regular cadence, not just when a critical advisory appears. Being on a recent version means that when a patch lands, you can apply it immediately. This mirrors site reliability engineering best practices: incremental changes are easier to test and roll out than catching up on a long backlog of skipped updates during an incident.

Update Often, and You'll Be Ready When It Counts

The goal isn't just to apply a security patch—it's to apply it without breaking anything or needing a rollback. By updating dependencies continuously, you build the muscle memory and confidence to ship changes to your environment under pressure. Each small, successful update is proof that you can deploy a fix quickly when a critical vulnerability appears.

Testing is essential to this confidence. As the DORA State of DevOps reports have shown, continuous integration and automated testing let developers move faster, and that speed translates into faster remediation. With a critical zero-day, your response window is measured in hours, not days. Solid test coverage means you can push a fix with confidence that it won't destabilize your environment.

Vulnerabilities Aren't Always Disclosed as Such

If you only update when a security advisory is published, you will miss vulnerabilities. While many large open source projects have mature security processes, several scenarios can slip through the cracks:

  • A security fix is bundled into a larger minor or major release. If the patch isn't backward compatible, you must take the new version to get the fix.
  • A vulnerability isn't disclosed, or disclosure comes later. A bug may not initially appear to have security implications, and maintainers may not flag it as security-related. Reading release notes helps catch these cases.
  • No patch exists, but a mitigation does. A new flag or configuration option can limit your exposure even if the root issue isn't fixed, and these changes may not be labeled as security updates.

Once an update for an open source project is public, anyone can audit it, so undisclosed fixes are rare—but not impossible to overlook if you're not tracking releases.

Automating Updates on GitHub

Dependabot security updates, natively available on GitHub, automatically open pull requests when your dependencies have known vulnerabilities. For keeping everything else current, Dependabot version updates check for new releases on a schedule you set and propose those updates as pull requests.

To enable version updates, commit a dependabot.yml configuration file to your repository. From there, keeping dependencies fresh becomes a matter of reviewing and merging pull requests regularly.

The payoff is threefold: you're positioned to apply the latest security patch immediately, you have demonstrated confidence in making critical changes when needed, and you're catching bugs that could have security implications before they're exploited. Dependabot security updates handle known vulnerabilities; version updates handle everything else that keeps your supply chain healthy.