diff --git a/requirements.txt b/requirements.txt
index 7e099ab..bcb10a0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ html5lib==0.9999999
 idna==2.6
 jmespath==0.9.3
 Keras==2.1.4
-lxml==4.1.1
+lxml==4.6.3
 Markdown==2.2.0
 mock==2.0.0
 nltk==3.2.5