Django: Cannot use ImageField because Pillow is not installed

Question

When I am trying to following command django give a following error.

python manage.py syncdb 

and django error is

CommandError: System check identified some issues:

ERRORS:
applicant.GalleryImage.image: (fields.E210) Cannot use ImageField because Pillow is not installed.
    HINT: Get Pillow at https://pypi.python.org/pypi/Pillow or run command "pip install pillow".
applicant.Speaker.image: (fields.E210) Cannot use ImageField because Pillow is not installed.
    HINT: Get Pillow at https://pypi.python.org/pypi/Pillow or run command "pip install pillow".

install packages in my virtualenv

(Dev-Env)➜  applicantWeb git:(master) ✗ pip freeze
beautifulsoup4==4.3.2
Django==1.7.1
django-mongodb-engine==0.5.2
djangotoolbox==1.6.2
ipython==3.1.0
oauthlib==0.7.2
Pillow==2.8.1
PyJWT==1.3.0
pymongo==3.0.2
python-openid==2.2.5
python-social-auth==0.2.10
requests==2.7.0
requests-oauthlib==0.5.0
six==1.9.0
wheel==0.24.0

I am tried to install following command still that error come.

pip install pillow

what should I do?