diff --git a/requirements.txt b/requirements.txt
index 488dc7c..708d5bd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ jupyter-client==5.3.4
 jupyter-core==4.6.1
 jupyterlab==1.2.4
 jupyterlab-server==1.0.6
-lxml==4.6.3
+lxml==4.9.1
 numpy==1.18.1
 pandas==1.0.1
 SQLAlchemy==1.3.13