$ make upgrade

requirements/edx/development.txt

@@ -270,7 +270,7 @@ pytest-cov==2.5.1
 pytest-django==3.1.2
 pytest-forked==0.2
 pytest-randomly==1.2.3
-pytest-xdist==1.24.1
+pytest-xdist==1.25.0
 pytest==3.6.3
 python-dateutil==2.4.0
 python-levenshtein==0.12.0
@@ -325,7 +325,7 @@ text-unidecode==1.2
 tincan==0.0.5
 toml==0.10.0
 tox-battery==0.5.1
-tox==3.5.3
+tox==3.6.0
 traceback2==1.4.0
 transifex-client==0.13.5
 twisted==16.6.0

requirements/edx/paver.txt

@@ -25,6 +25,6 @@ pyyaml==3.13              # via watchdog
 requests==2.21.0
 six==1.11.0               # via edx-opaque-keys, libsass, paver, stevedore
 stevedore==1.10.0
-urllib3==1.23
+urllib3==1.23             # via requests
 watchdog==0.9.0
 wrapt==1.10.5

requirements/edx/testing.txt

@@ -245,7 +245,7 @@ pyjwkest==1.3.2
 pyjwt==1.5.2
 pylint-celery==0.3        # via edx-lint
 pylint-django==0.7.2      # via edx-lint
-pylint-plugin-utils==0.3
+pylint-plugin-utils==0.3  # via pylint-celery, pylint-django
 pylint==1.7.6             # via edx-lint, pylint-celery, pylint-django, pylint-plugin-utils
 pymongo==2.9.1
 pynliner==0.8.0
@@ -259,7 +259,7 @@ pytest-cov==2.5.1
 pytest-django==3.1.2
 pytest-forked==0.2        # via pytest-xdist
 pytest-randomly==1.2.3
-pytest-xdist==1.24.1
+pytest-xdist==1.25.0
 pytest==3.6.3
 python-dateutil==2.4.0
 python-levenshtein==0.12.0
@@ -310,7 +310,7 @@ text-unidecode==1.2       # via faker
 tincan==0.0.5
 toml==0.10.0              # via tox
 tox-battery==0.5.1
-tox==3.5.3
+tox==3.6.0
 traceback2==1.4.0         # via testtools, unittest2
 transifex-client==0.13.5
 twisted==16.6.0           # via pa11ycrawler, scrapy