diff --git a/requirements.txt b/requirements.txt
index 0eb0d06..4e0ee59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -111,7 +111,7 @@ langdetect==1.0.7
 lazy-object-proxy==1.4.3
 lightgbm==2.3.1
 llvmlite==0.31.0
-lxml==4.6.2
+lxml==4.9.1
 lz4==3.0.2
 Mako==1.2.2
 Markdown==3.1