diff --git a/requirements.txt b/requirements.txt
index f9e86e0..a8452bb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ Keras==2.2.0
 Keras-Applications==1.0.2
 Keras-Preprocessing==1.0.1
 kiwisolver==1.0.1
-lxml==4.2.1
+lxml==4.6.2
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.2