Django==1.11.4
dj-database-url==0.4.2
django-cors-middleware==1.3.1
django-extensions==1.9.0
django-test-without-migrations==0.6
gunicorn==19.7.1
psycopg2==2.7.3.1
python-decouple==3.0
pytz==2017.2
whitenoise==3.3.0

Django==1.11.4
dj-database-url==0.4.2
django-cors-middleware==1.3.1
django-extensions==1.9.0
django-test-without-migrations==0.6
gunicorn==19.7.1
psycopg2==2.7.3.1
python-decouple==3.1
pytz==2017.2
whitenoise==3.3.0

Update python-decouple from 3.0 to 3.1
Update python-decouple from 3.0 to 3.1