diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index 81a7f9e725..824608a8c3 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -239,6 +239,7 @@ user-util==0.1.5
 voluptuous==0.11.5
 watchdog==0.9.0
 web-fragments==0.2.2
+webencodings==0.5.1       # via html5lib
 webob==1.8.3              # via xblock
 wrapt==1.10.5
 xblock-review==1.1.5
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index 3a799f1864..cbb2a5d896 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -338,12 +338,13 @@ uritemplate==3.0.0
 urllib3==1.23
 urlobject==2.4.3
 user-util==0.1.5
-virtualenv==16.0.0
+virtualenv==16.1.0
 voluptuous==0.11.5
 vulture==1.0
 w3lib==1.19.0
 watchdog==0.9.0
 web-fragments==0.2.2
+webencodings==0.5.1
 webob==1.8.3
 werkzeug==0.14.1
 wrapt==1.10.5
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index de52476fa6..62161c8999 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -322,11 +322,12 @@ uritemplate==3.0.0
 urllib3==1.23
 urlobject==2.4.3          # via pa11ycrawler
 user-util==0.1.5
-virtualenv==16.0.0        # via tox
+virtualenv==16.1.0        # via tox
 voluptuous==0.11.5
 w3lib==1.19.0             # via parsel, scrapy
 watchdog==0.9.0
 web-fragments==0.2.2
+webencodings==0.5.1
 webob==1.8.3
 werkzeug==0.14.1          # via flask
 wrapt==1.10.5