diff --git a/requirements.txt b/requirements.txt
index e9cbae2..f3d3ad9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ jupyterlab-server==1.0.6
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 leveldb==0.201
-lxml==4.4.1
+lxml==4.9.1
 MagicBaidu==0.0.9
 Markdown==3.1.1
 MarkupSafe==1.1.1