diff --git a/requirements.txt b/requirements.txt
index 93ad522..8cd657f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ numpy==1.17.2
 scikit-learn==0.21.3
 langid==1.1.6
 bs4==0.0.1
-lxml==4.4.1
+lxml==4.6.3
 requests==2.22.0
 # when this branch is merged into upstream and released
 -e git://github.com/aau-network-security/pywhois.git@release-for-richkit#egg=python-whois
diff --git a/setup.py b/setup.py
index db1fde3..94427d6 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
                       'scikit-learn==0.21.3',
                       'langid==1.1.6',
                       'bs4==0.0.1',
-                      'lxml==4.4.1',
+                      'lxml==4.6.3',
                       'requests==2.22.0',
                       'pytest',
                       'dnspython',