diff --git a/requirements.txt b/requirements.txt
index c764351..ba4a8d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ keras-resnet==0.1.0
 keras-retinanet==0.5.1
 kiwisolver==1.2.0
 llvmlite==0.32.1
-lxml==4.5.0
+lxml==4.9.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.2.1