diff --git a/requirements.txt b/requirements.txt
index 7b50df1..0c3a752 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-lxml==4.0.0
+lxml==4.9.1
 elasticsearch==5.4.0
 xmltodict==0.11.0