diff --git a/requirements.txt b/requirements.txt
index f0fac3f..8785dc6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ html5lib==0.9999999
 idna==2.2
 keyring==10.1
 keyrings.alt==1.3
-lxml==3.7.1
+lxml==4.6.3
 Markdown==2.6.11
 numpy==1.14.4
 opencv-python==3.4.3.18