pip install collects pillow <6.0.0

[FM29]

Hi,
i tried to use
pip install enso
on my Linux terminal. I have Python 3.8 and pip20.2.4

It correctly catches all rquirements but for some reason wants to collect Pillow <6.0.0, although i installed a higher version
How can i get it installed?
Here is my error message:

pip install enso Defaulting to user installation because normal site-packages is not writeable Processing ./.cache/pip/wheels/e4/d4/3c/78480c93244c00a1929d58d69ffdcc313e37de0bf5d503a8f6/enso-0.1.6-cp38-none-any.whl Requirement already satisfied: scikit-learn>=0.18.0 in ./.local/lib/python3.8/site-packages (from enso) (0.23.2) Requirement already satisfied: seaborn>=0.8.1 in ./.local/lib/python3.8/site-packages (from enso) (0.11.0) Requirement already satisfied: tqdm>=4.19.4 in ./.local/lib/python3.8/site-packages (from enso) (4.52.0) Requirement already satisfied: numpy>=1.13.1 in ./.local/lib/python3.8/site-packages (from enso) (1.18.5) Requirement already satisfied: pandas>=0.20.3 in ./.local/lib/python3.8/site-packages (from enso) (1.1.4) Requirement already satisfied: click>=6.7 in /usr/lib/python3/dist-packages (from enso) (7.0) Processing ./.cache/pip/wheels/31/38/61/478dac539ef21cb44f6d5e6a6000d066fae45a3aea118ca071/IndicoIo-1.4.1-cp38-none-any.whl Requirement already satisfied: bs4>=0.0.1 in ./.local/lib/python3.8/site-packages (from enso) (0.0.1) Requirement already satisfied: threadpoolctl>=2.0.0 in ./.local/lib/python3.8/site-packages (from scikit-learn>=0.18.0->enso) (2.1.0) Requirement already satisfied: joblib>=0.11 in ./.local/lib/python3.8/site-packages (from scikit-learn>=0.18.0->enso) (0.17.0) Requirement already satisfied: scipy>=0.19.1 in ./.local/lib/python3.8/site-packages (from scikit-learn>=0.18.0->enso) (1.5.4) Requirement already satisfied: matplotlib>=2.2 in ./.local/lib/python3.8/site-packages (from seaborn>=0.8.1->enso) (3.3.3) Requirement already satisfied: pytz>=2017.2 in /usr/lib/python3/dist-packages (from pandas>=0.20.3->enso) (2019.3) Requirement already satisfied: python-dateutil>=2.7.3 in /usr/lib/python3/dist-packages (from pandas>=0.20.3->enso) (2.7.3) Requirement already satisfied: msgpack-numpy==0.4.1 in ./.local/lib/python3.8/site-packages (from IndicoIo>=1.1.5->enso) (0.4.1) ollecting Pillow<6.0.0 Using cached Pillow-5.4.1.tar.gz (16.0 MB) Requirement already satisfied: msgpack==0.5.6 in ./.local/lib/python3.8/site-packages (from IndicoIo>=1.1.5->enso) (0.5.6) Requirement already satisfied: requests>=2.2.1 in /usr/lib/python3/dist-packages (from IndicoIo>=1.1.5->enso) (2.22.0) Requirement already satisfied: setuptools>=36.5.0 in /usr/lib/python3/dist-packages (from IndicoIo>=1.1.5->enso) (45.2.0) Requirement already satisfied: six>=1.3.0 in /usr/lib/python3/dist-packages (from IndicoIo>=1.1.5->enso) (1.14.0) Requirement already satisfied: beautifulsoup4 in ./.local/lib/python3.8/site-packages (from bs4>=0.0.1->enso) (4.9.3) Requirement already satisfied: kiwisolver>=1.0.1 in ./.local/lib/python3.8/site-packages (from matplotlib>=2.2->seaborn>=0.8.1->enso) (1.3.1) Requirement already satisfied: cycler>=0.10 in ./.local/lib/python3.8/site-packages (from matplotlib>=2.2->seaborn>=0.8.1->enso) (0.10.0) Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in ./.local/lib/python3.8/site-packages (from matplotlib>=2.2->seaborn>=0.8.1->enso) (2.4.7) Requirement already satisfied: msgpack-python>=0.3.0 in ./.local/lib/python3.8/site-packages (from msgpack-numpy==0.4.1->IndicoIo>=1.1.5->enso) (0.5.6) Requirement already satisfied: soupsieve>1.2; python_version >= "3.0" in ./.local/lib/python3.8/site-packages (from beautifulsoup4->bs4>=0.0.1->enso) (2.0.1) Building wheels for collected packages: Pillow Building wheel for Pillow (setup.py) ... error ERROR: Command errored out with exit status 1: command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-x1l3lqp4/pillow/setup.py'"'"'; __file__='"'"'/tmp/pip-install-x1l3lqp4/pillow/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-nfu90yfj cwd: /tmp/pip-install-x1l3lqp4/pillow/