Pygments versions 0.3.4

[freshlearner]

hi, Alicia. i meet some problems while running NucleoATAC, i'm here to ask you for help .
I have installed NucleoATAC Successfully by using pip.

but it gives me an error while i tried to run example's command "nucleoatac run --bed example.bed --bam example.bam --fasta sacCer3.fa --out test --cores 1"
it says : pkg_resources.VersionConflict: (Pygments 2.2.0 (/opt/lib/python2.7/site-packages), Requirement.parse('Pygments<2'))
Then i tried to change the version of Pygments with 1.6 , but i gives me an another error :
"pkg_resources.VersionConflict: (Pygments 1.6 (/opt/lib/python2.7/site-packages), Requirement.parse('Pygments >=2.0'))"

I don't know what's wrong ?
looking for your reply.
Thank you very much
yours
JianZhou