diff --git a/requirements.txt b/requirements.txt
index 9fbc709..f1b589a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,3 +9,4 @@ MarkupSafe==1.1.1
 requests==2.25.1
 urllib3==1.26.3
 Werkzeug==1.0.1
+lxml==4.9.2