Updated requirements list

requirements.txt

@@ -1,20 +1,20 @@
 Django>=1.11,<2.0
-django-cors-headers>=2.1
-django-debug-toolbar>=1.8
+django-cors-headers>=2.1.0
+django-debug-toolbar>=1.9.0
 django-filter>=1.1.0
-django-mptt==0.8.7
+django-mptt>=0.9.0
 django-rest-swagger>=2.1.0
-django-tables2>=1.10.0
+django-tables2>=1.19.0
 django-timezone-field>=2.0
-djangorestframework>=3.6.4
-graphviz>=0.6
-Markdown>=2.6.7
-natsort>=5.0.0
+djangorestframework>=3.7.7
+graphviz>=0.8.2
+Markdown>=2.6.11
+natsort>=5.2.0
 ncclient==0.5.3
 netaddr==0.7.18
-paramiko>=2.0.0
-Pillow>=4.0.0
+paramiko>=2.4.0
+Pillow>=5.0.0
 psycopg2-binary>=2.7.4
 py-gfm>=0.1.3
-pycryptodome>=3.4.7
-xmltodict>=0.10.2
+pycryptodome>=3.4.11
+xmltodict>=0.11.0