When GitHub Actions fail due to dependency issues, it often results from outdated packages or dependency conflicts. To resolve this, check for any updates or specific version requirements within your workflow file (YAML configuration). Running `npm install` with an updated package-lock.json or equivalent ensures that the workflow has all necessary versions. Additionally, caching dependencies between runs can improve reliability and reduce the chance of version conflicts; this is done by adding a caching step using GitHub’s `actions/cache` action. Regularly updating dependencies, testing versions locally, and employing caching contribute to more stable GitHub Actions workflows with minimized dependency errors.