diff --git a/requirements.txt b/requirements.txt
index a249984..5db860a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 kiwisolver==1.1.0
 krakenex==2.1.0
-lxml==4.6.5
+lxml==4.9.1
 Markdown==3.2.1
 marshmallow==3.5.0
 matplotlib==3.1.3