diff --git a/kernel/requirements.txt b/kernel/requirements.txt
index 947efe4..0989c64 100644
--- a/kernel/requirements.txt
+++ b/kernel/requirements.txt
@@ -4,7 +4,7 @@ build
 cplot
 docutils==0.19
 matplotlib==3.5.2
-nltk==3.8.1
+nltk==3.9.1
 numpy==1.24.2
 scipy==1.9.3
 sympy==1.12