diff --git a/requirements.txt b/requirements.txt
index dd2a67c..76b699a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ llvmlite==0.20.0
 locket==0.2.0
 lockfile==0.12.2
 luigi==2.7.5
-lxml==3.8.0
+lxml==4.6.3
 MarkupSafe==1.0
 marshmallow==2.15.0
 mccabe==0.6.1