diff --git a/requirements.txt b/requirements.txt
index f9e43cc..b80c463 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 appdirs==1.4.3
 future==0.16.0
-lxml==4.1.0
+lxml==4.6.3
 objectpath==0.5
 packaging==16.8
 pyparsing==2.2.0