diff --git a/requirements.txt b/requirements.txt
index dd05f5b..30d4a6b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -100,7 +100,7 @@ linear-tsv==1.1.0
 llvmlite==0.20.0
 lml==0.0.4
 locket==0.2.0
-lxml==4.1.0
+lxml==4.6.2
 MarkupSafe==1.0
 matplotlib==3.0.1
 mccabe==0.6.1