diff --git a/python-env-requirements.txt b/python-env-requirements.txt
index 3368c38..9136e9c 100644
--- a/python-env-requirements.txt
+++ b/python-env-requirements.txt
@@ -13,7 +13,7 @@ MySQL-python==1.2.3
 # these are install from zip/tarball (NOT pypi!)
 anki==1.0.1
 html5lib==0.90
-nltk==2.0b9
+nltk==3.6.3
 
 # for our bootstrap
 virtualenv==1.5.1