How to upgrade the Python version inside a virtualenv?

I updated python from version 3.6.0 to version 3.6.3. the table of contents
Just in the cmd box shows new version, but inside virtualenv shows the old version

Found a recommendation to run
python-m venv --upgrade ENV_DIR

- returns status 1 (what's this?) but nothing changes
(windows 10)
June 10th 19 at 16:51
2 answers
June 10th 19 at 16:53
Solution
Install the required Python in the system
Create a new environment as the new Python
Install there old packages
June 10th 19 at 16:55
Solution
to create a virtualenv with the new Python, and the old - to remove.

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