diff --git a/requirements.txt b/requirements.txt
index a764480..11b769c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 beautifulsoup4==4.5.3
-lxml==4.6.3
+lxml==4.9.1
 pdfkit==0.6.1
 PyPDF2==1.26.0