diff --git a/requirements.txt b/requirements.txt
index 67f853e..5b9d5f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ mod-wsgi==4.6.8
 Django==2.2.7
 
 
-lxml==4.2.5
+lxml==4.9.1
 suds-py3==1.3.4.0
 biopython==1.72