Hi @amosbastian! Thank you for your fast response. As the package mindr has been submitted to CRAN, it has to fulfill the CRAN requirements, including the [CRAN rule of license](https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Licensing). It means that I have to clarify the license in the [DESCRIPTION file like](https://github.com/pzhaonet/mindr/blame/master/DESCRIPTION#L11) `License: MIT + file LICENSE` and the text you mentioned in 'LICENSE'. CRAN rejects those submissions without these texts. This CRAN rule was [criticized on stackoverflow](https://stackoverflow.com/questions/43550479/how-to-satisfy-both-cran-and-github-license-file-naming-requirements). 

I have just made a [new commit](https://github.com/pzhaonet/mindr/commit/cb191d85db59c94b5b483d0f5baa4221e7256bee) and added a LICENCE file for Github, and hided the CRAN LICENSE file. We will see what CRAN's response will be.

Thank you for your careful review and kind suggestions!