diff --git a/requirements_dev.txt b/requirements_dev.txt
index 26d703d..e192b1f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,8 +3,8 @@ coverage==7.2.3
 flake8==6.0.0
 gensim==4.3.1
 mypy==1.2.0
-nltk==3.8.1
+nltk==3.9
 numpy==1.24.2
 pycln==2.1.3
 pylint==2.17.2
-pytest==7.3.1
\ No newline at end of file
+pytest==7.3.1