diff --git a/django_auth_example/requirements.txt b/django_auth_example/requirements.txt
index e3b1f324..caca4b8f 100644
--- a/django_auth_example/requirements.txt
+++ b/django_auth_example/requirements.txt
@@ -97,7 +97,7 @@ navigator-updater==0.2.1
 nbconvert==5.3.1
 nbformat==4.4.0
 networkx==2.1
-nltk==3.3
+nltk==3.6.3
 nose==1.3.7
 notebook==5.5.0
 numba==0.38.0