diff --git a/requirements.txt b/requirements.txt
index d358cba..68149bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ jedi==0.13.3
 jsonschema==3.0.1
 jupyter-client==5.2.4
 jupyter-core==4.4.0
-lxml==4.3.2
+lxml==4.9.1
 numpy==1.16.2
 pandas==0.24.2
 parsel==1.5.1