diff --git a/requirements.txt b/requirements.txt
index 904b709..438c9b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 requests==2.18.4
 urllib3==1.22
-lxml==4.1.1
+lxml==4.9.1
 pytest==3.2.3