-r requirements.txt
django-debug-toolbar==1.6
django-test-without-migrations==0.6
mixer==5.6.6

-r requirements.txt
django-debug-toolbar==1.8
django-test-without-migrations==0.6
mixer==5.6.6

Update django-debug-toolbar from 1.6 to 1.8
Update django-debug-toolbar from 1.6 to 1.8