diff --git a/requirements.txt b/requirements.txt
index cf1f78a..9b87669 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ imagesize==0.7.1
 ipython==7.16.3
 ipython-genutils==0.1.0
 Jinja2>=2.8.1
-lxml==4.6.5
+lxml==4.9.1
 MarkupSafe==0.23
 matplotlib==1.5.1
 nltk>=3.4.5