pip3 install --upgrade homeassistant upgrade error in VENV

error: could not create '/usr/local/lib/python3.4/dist-packages/homeassistant': Permission denied

----------------------------------------
Cleaning up...
Command /usr/bin/python3 -c "import setuptools, tokenize;__file__='/tmp/pip-build-gw5xv92o/homeassistant/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-hugiu5fd-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip-build-gw5xv92o/homeassistant
Storing debug log for failure in /home/pi/.pip/pip.log
pi@raspberrypi:/srv/hass/hass_venv $ error: could not create '/usr/local/lib/python3.4/dist-packages/homeassistant': Permission denied
-bash: error:: command not found