diff --git a/frozen-requirements.txt b/frozen-requirements.txt
index eaff2a7..82dfa4f 100644
--- a/frozen-requirements.txt
+++ b/frozen-requirements.txt
@@ -25,7 +25,7 @@ ipaddress==1.0.17
 ipython==5.5.0
 ipython-genutils==0.2.0
 Jinja2==2.10
-lxml==4.2.1
+lxml==4.6.5
 lz4==0.10.1
 MarkupSafe==1.0
 matplotlib==2.1.1