diff --git a/requirements.txt b/requirements.txt
index 86fabcd..d8b9db5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,5 +3,5 @@ torch==1.8.1
 termcolor==1.1.0
 SpeechRecognition==3.8.1
 numpy==1.19.5
-nltk==3.5
+nltk==3.6.4
 pyaudio
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