diff --git a/requirements.txt b/requirements.txt
index bf4967e..37a8e42 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 line_profiler==3.3.1
 Markdown==3.1.1
-nltk==3.4.5
+nltk==3.8.1
 matplotlib==2.2.5
 numpy~=1.18.5
 pandas==0.24.2
diff --git a/requirements38.txt b/requirements38.txt
index 39926b5..cf82a22 100644
--- a/requirements38.txt
+++ b/requirements38.txt
@@ -22,7 +22,7 @@ Keras-Preprocessing==1.1.0
 loky==2.9.0
 line_profiler==3.3.1
 Markdown==3.1.1
-nltk==3.5
+nltk==3.8.1
 matplotlib==2.2.5
 numpy==1.21.5
 pandas==1.2.0