diff --git a/requirements.txt b/requirements.txt
index 69e2090..0ca4aea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ Keras-Applications==1.0.7
 Keras-Preprocessing==1.0.9
 kiwisolver==1.0.1
 lmdb==0.94
-lxml==4.3.4
+lxml==4.9.1
 Markdown==3.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3