> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.41.14-rc2 **`(internal):`** Remove bang operator and fix eslint warning in `compatible-ir-versions.ts`. ## 0.41.14-rc1 **`(feat):`** Running `fern check` will now check to confirm that the generator versions you are running are compatible with your Fern CLI version. Each version of SDK generators depends on a version of a library that is exported by the Fern CLI, and as a result, each generator has a minimum compatible version of the Fern CLI. As an example, if you were to run `fern check` while leveraging `fernapi/fern-python-sdk` version `2.0.0`, on CLI version `0.1.3`, you'd receive the following error: `The generator fernapi/fern-python-sdk requires CLI version 0.23.0-rc4 or later (current version: 0.1.3-rc0).` Indicating that you must upgrade your CLI in order to leverage the current generator. ### What's new * Running `fern check` will now check to confirm that the generator versions you are running are compatible with your Fern CLI version. * Fern commands now print out generator upgrades, in addition to CLI upgrades.