diff --git a/requirements.txt b/requirements.txt
index 90e874e..0dfddcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,6 +11,6 @@ pyzmq==14.3.1
 scipy==0.14.0
 six==1.7.3
 tornado==4.0.2
-lxml==4.6.5
+lxml==4.9.1
 requests>=2.20.0
 MyCapytain==0.0.3