diff --git a/requirements.txt b/requirements.txt
index 0e06941..56f4779 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ colorama==0.4.3
 coverage==5.3
 green==3.2.2
 iniconfig==1.0.1
-lxml==4.5.2
+lxml==4.9.1
 packaging==20.4
 pluggy==0.13.1
 py==1.9.0