diff --git a/requirements.txt b/requirements.txt
index 7c26c0d..abe80d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ googleapis-common-protos==1.5.3
 httplib2==0.19.0
 idna==2.6
 jws==0.1.3
-lxml==4.6.5
+lxml==4.9.1
 oauth2client==4.1.2
 pipreqs==0.4.9
 protobuf==3.15.0