diff --git a/docs/dev/requirements.txt b/docs/dev/requirements.txt
index 8045fe8..e5673bd 100644
--- a/docs/dev/requirements.txt
+++ b/docs/dev/requirements.txt
@@ -20,7 +20,7 @@ google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.4.1
 googleapis-common-protos==1.51.0
 httplib2==0.19.0
-lxml==4.5.0
+lxml==4.6.2
 oauthlib==3.1.0
 requests==2.23.0
 requests-oauthlib==1.3.0