diff --git a/counter_terrorism_with_ML/REQUIREMENTS.txt b/counter_terrorism_with_ML/REQUIREMENTS.txt
index 8dbd3b1..c22f1e9 100644
--- a/counter_terrorism_with_ML/REQUIREMENTS.txt
+++ b/counter_terrorism_with_ML/REQUIREMENTS.txt
@@ -2,4 +2,4 @@ flask>=0.12.3
 numpy==0.10
 pandas==0.20
 sklearn==0.23
-NLTK==3.3
+NLTK==3.4.5