diff --git a/SmartHome_Cacty/requirements.txt b/SmartHome_Cacty/requirements.txt
index e2818a3..5ae32db 100644
--- a/SmartHome_Cacty/requirements.txt
+++ b/SmartHome_Cacty/requirements.txt
@@ -162,7 +162,7 @@ navigator-updater==0.2.1
 nbconvert==5.6.0
 nbformat==4.4.0
 networkx==2.3
-nltk==3.4
+nltk==3.4.5
 nose==1.3.7
 notebook==5.7.4
 numba==0.41.0