diff --git a/requirements.txt b/requirements.txt
index 04597381..4870dd7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -88,7 +88,7 @@ lazy-object-proxy==1.3.1
 libarchive-c==2.8
 llvmlite==0.26.0
 locket==0.2.0
-lxml==4.2.5
+lxml==4.9.1
 Mako==1.0.7
 MarkupSafe==1.0
 matplotlib==3.0.2