diff --git a/requirements.txt b/requirements.txt
index 0fc8524..852fb5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ google-auth==1.24.0
 google-auth-oauthlib==0.4.2
 gspread==3.6.0
 idna==2.10
-lxml==4.6.2
+lxml==4.9.1
 oauthlib==3.1.0
 premailer==3.7.0
 psutil==5.8.0