diff --git a/children-society/python3-notebook/requirements.txt b/children-society/python3-notebook/requirements.txt
index b6a67a0..ff442ba 100644
--- a/children-society/python3-notebook/requirements.txt
+++ b/children-society/python3-notebook/requirements.txt
@@ -5,6 +5,6 @@ plotly==2.0.5
 scikit-learn==0.18.1
 scipy==0.19.0
 spacy==1.7.2
-nltk==3.2.2
+nltk==3.4.5
 gensim==1.0.1
 seaborn==0.7.1