diff --git a/requirements/edx-sandbox/base.txt b/requirements/edx-sandbox/base.txt
index f88cc899cf..58f99d4222 100644
--- a/requirements/edx-sandbox/base.txt
+++ b/requirements/edx-sandbox/base.txt
@@ -1,4 +1,5 @@
 numpy==1.6.2
 networkx==1.7
 sympy==0.7.1
-pyparsing==1.5.6
\ No newline at end of file
+pyparsing==1.5.6
+nltk==2.0.4