diff --git a/requirements.txt b/requirements.txt
index 62fa421..9406144 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ jupyter-highlight-selected-word==0.2.0
 jupyter-latex-envs==1.4.6
 jupyter-nbextensions-configurator==0.4.1
 kiwisolver==1.2.0
-lxml==4.5.1
+lxml==4.6.5
 MarkupSafe==1.1.1
 matplotlib==3.2.1
 mistune==0.8.4