diff --git a/dash-heroku-master/requirements.txt b/dash-heroku-master/requirements.txt
index a61c9df..7465c28 100644
--- a/dash-heroku-master/requirements.txt
+++ b/dash-heroku-master/requirements.txt
@@ -97,7 +97,7 @@ lazy-object-proxy==1.4.2
 lightgbm==2.2.3
 lime==0.1.1.36
 llvmlite==0.29.0
-lxml==4.5.0
+lxml==4.6.2
 lz4==3.0.2
 Markdown==3.1.1
 MarkupSafe==1.1.1