diff --git a/requirements.txt b/requirements.txt
index 233eaef0..f9e54451 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ google-api-python-client==1.6.2
 httplib2==0.10.3
 idna==2.5
 itsdangerous==0.24
-lxml==3.6.0
+lxml==4.2.5
 oauth2client==4.1.1
 pyasn1==0.2.3
 pyasn1-modules==0.0.9