Which WordPress version?
**What version of WordPress does SlickStack install?**
Generally it installs the latest (current) version of WordPress, as long its not a major version. In other words, since our goal is stability and security, SlickStack will always bundle the most recent “minor” version of WordPress. So if the latest release of WordPress over at WordPress.org is currently 5.2.0 then SlickStack will usually wait to bundle version 5.2.1 because these minor versions (as per semantic versioning standards) means that several bugs and patches have now been fixed. So in this scenario if 5.2.1 is not yet available, then SlickStack will install 5.1.1 because its the latest stable “minor” patched release.
More: https://slickstack.io/features/wordpress/