django==2.1.5
django-bootstrap-form==3.4
django-tastypie==0.14.2 # API
django-registration==3.0 # account logic, views and workflows
pytz==2018.9
ordereddict==1.1
PyYAML==3.13
pySankeyBeta==1.0.4

django==2.1.5
django-bootstrap-form==3.4
django-tastypie==0.14.2 # API
django-registration==3.0 # account logic, views and workflows
pytz==2018.9
ordereddict==1.1
pyyaml>=4.2b1
pySankeyBeta==1.0.4

Fix - Upgrade PyYaml for security reasons
Fix - Upgrade PyYaml for security reasons

In PyYAML before 4.1, the yaml.load() API could execute arbitrary code.
