diff --git a/unsupported/attack-predictor/1.0.0/requirements.txt b/unsupported/attack-predictor/1.0.0/requirements.txt
index 2a46021e..43866d3d 100644
--- a/unsupported/attack-predictor/1.0.0/requirements.txt
+++ b/unsupported/attack-predictor/1.0.0/requirements.txt
@@ -1,6 +1,6 @@
 colorama==0.4.4
 joblib==0.14.1
-nltk==3.4.5
+nltk==3.6.6
 numpy==1.17.4
 pandas==0.25.3
 #scikit-learn==0.22.2.post1