diff --git a/requirements.txt b/requirements.txt
index 6ff2e52..1c114b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ html2text==2014.12.29
 idna==2.6
 iiif-prezi==0.3.0
 kombu==4.1.0
-lxml==4.6.1
+lxml==4.9.1
 Markdown==2.6.11
 mysql-connector==2.2.9
 mysqlclient==1.3.14