How to change Python version in Jupyter notebook?

Question

at the beginning I had installed the newest Python 3.9 version. However, on this version I was not able to install tensorflow, which I read is not supporting this version. After it, I installed Python 3.8.7 but my jupyter notebook is still using Python 3.9. How can I change version in Jupyter Notebook to use 3.8.7 instead of 3.9? Thanks in advance.

Answer 1

pip3 install ipykernel --upgrade
python3 -m ipykernel install --user

References:

Jupyter Notebook can't find modules for python 3.6