diff --git a/requirements.txt b/requirements.txt
index 4dfc8d7..79fbe9c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ h5py==2.8.0
 httplib2==0.12.0
 idna==2.7
 kiwisolver==1.0.1
-lxml==4.2.5
+lxml==4.6.5
 matplotlib==2.2.3
 mpl-finance==0.10.0
 numpy==1.15.4