diff --git a/requirements.txt b/requirements.txt
index 31b4600..15eaae6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ Keras-Preprocessing==1.1.0
 keyring==21.2.1
 kiwisolver==1.2.0
 konlpy==0.5.2
-lxml==4.6.3
+lxml==4.9.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.2.1