diff --git a/requirements.txt b/requirements.txt
index 1c127ab..dd540fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ chardet==3.0.4
 cryptography==2.5
 future==0.17.1
 idna==2.8
-lxml==4.3.1
+lxml==4.9.1
 multidict==4.5.2
 pycparser==2.19
 python-telegram-bot==11.1.0