diff --git a/requirements.txt b/requirements.txt
index 96ad433..1a3ff8c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ pytest==3.2.1 # Updated from 3.0.2
 Sphinx==1.6.3 # Updated from 1.4.8
 pytz==2017.2 # Updated from 2016.6.1
 requests==2.21.0 # Updated from 2.11.1
-lxml==3.8.0 # Updated from 3.6.4
+lxml==4.6.2 # Updated from 3.6.4
 pytest-cov == 2.3.1
 recommonmark==0.4.0
 sphinx-rtd-theme==0.2.4 # Updated from 0.1.9