update requirements.txt

requirements.txt

 ## NOTE: This is not a working req file -- merely a collection for notes.
-django<1.10
+django==1.9
 djangorestframework
 django-cors-headers
 django-oauth-toolkit==0.11.0
@@ -9,5 +9,5 @@ uwsgi
 pysftp
 boto
 pyyaml
-requests
+requests==2.18.1
 celery==3.1.18