diff --git a/PythonCode/Python2_conda_requirements.txt b/PythonCode/Python2_conda_requirements.txt
index 8b6ee65f..1942e15b 100644
--- a/PythonCode/Python2_conda_requirements.txt
+++ b/PythonCode/Python2_conda_requirements.txt
@@ -1,5 +1,5 @@
 gensim==0.13.3
-nltk==3.2.1
+nltk==3.4.5
 unidecode==0.04.20
 statsmodels==0.6.1
 matplotlib==1.5.3