diff --git a/requirements.txt b/requirements.txt
index 9c465e1..7c6edaf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -109,7 +109,7 @@ lief==0.9.0
 linear-tsv==1.1.0
 llvmlite==0.28.0
 locket==0.2.0
-lxml==4.3.3
+lxml==4.6.3
 MarkupSafe==1.1.1
 matplotlib==3.0.3
 mccabe==0.6.1