diff --git a/requirements.txt b/requirements.txt
index 3a9a2e5..b0935be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 colorama==0.4.1
 Jinja2==2.10.1
 MarkupSafe==1.1.1
-lxml==4.3.0
+lxml==4.9.1
 asn1crypto==0.24.0
 certifi==2018.8.24
 cffi==1.11.5