layout: default title: Upgrading from 1.x - 1.3
There are no breaking changes introduced in 1.3, but we did move most of our extensions into the core library.
Previously, anyone wanting GFM support had to install additional libraries like league/commonmark-extras. This is no longer required as GFM support is now built into this library! This is also true for other official extensions like league/commonmark-ext-inlines-only.
If you were previously using any of the league/commonmark-ext* libraries:
league/commonmark 1.3+League\CommonMark\Ext\ and replace it with League\CommonMark\Extension\)league/commonmark-ext* dependencies from ComposerSee the GitHub-Flavored Markdown extension documentation for more information on using this extension. Additional details can also be found in Colin O'Dell's blog post.