diff --git a/requirements.txt b/requirements.txt
index f49129f..efec06f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,14 +1,14 @@
 textacy==0.10.0
 tqdm==4.38.0
 spacy==3.2.2
-nltk==3.4.5
+nltk==3.6.6
 cython==0.29.28
 msgpack==0.6.1
 anytree==2.5.0
 tinysegmenter==0.4
 textblob==0.15.3
 mosestokenizer==1.1.0
-nltk==3.4.5
+nltk==3.6.6
 analyzer==0.1.1
 Sastrawi==1.0.1
 scikit-learn==0.24.2