diff --git a/requirements.txt b/requirements.txt
index c1b286d..a757fe5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,5 +24,5 @@ pysocks==1.6.6
 unittest2==1.1.0
 coverage==4.0.3
 xmlunittest==0.3.2
-lxml==3.4
+lxml==4.9.3
 mock==2.0.0