how to install package with version code example

Example 1: how to pip install a specific version

# At the time of writing this numpy is in version 1.19.x
# This statement below will install numpy version 1.18.1
python -m pip install numpy==1.18.1

Example 2: how to install specific package version npm

$ npm install express@4.16.1

+ express@4.16.1
added 48 packages from 36 contributors and audited 121 packages in 2.986s
found 0 vulnerabilities