PyCharm not detecting Django installed applications

PyCharm version: Professional 2018.1

Django version: 2.0

virtualenv: pipenv

I have setup project interpreter to the virtual environment created using pipenv

File > Default settings > Project interpreter

can see installed applications like djangorestframework

import from Django seems to be working but not from djangorestframework

same happens with other installed apps. Also installing from terminal within the PyCharm

pipenv install package_name

installs the application at root instead of virtualenv