diff --git a/requirements.txt b/requirements.txt
index 3437d9c..57c7310 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ grpcio==1.17.0
 h5py==2.8.0
 html5lib==0.9999999
 kiwisolver==1.0.1
-lxml==4.6.2
+lxml==4.6.3
 Markdown==3.0.1
 matplotlib==3.0.2
 more-itertools==4.3.0