diff --git a/requirements.txt b/requirements.txt
index 00e94b7..4cfdef5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ lazy-object-proxy==1.4.3
 lifelines==0.24.7
 llvmlite==0.31.0
 locket==0.2.0
-lxml==4.5.0
+lxml==4.6.5
 MarkupSafe==1.1.1
 matplotlib==3.2.1
 mccabe==0.6.1