diff --git a/requirements/edx-sandbox/base.txt b/requirements/edx-sandbox/base.txt
index 3d69968599..39d84173ab 100644
--- a/requirements/edx-sandbox/base.txt
+++ b/requirements/edx-sandbox/base.txt
@@ -13,6 +13,7 @@ numpy==1.6.2
 networkx==1.7
 sympy==0.7.1
 pyparsing==2.0.7
+cryptography==1.9
 
 # We forked NLTK just to make it work with setuptools instead of distribute
 git+https://github.com/edx/nltk.git@2.0.6#egg=nltk==2.0.6