diff --git a/nebula_sniffer/requirements.txt b/nebula_sniffer/requirements.txt
index 85e3970..5bf8c00 100644
--- a/nebula_sniffer/requirements.txt
+++ b/nebula_sniffer/requirements.txt
@@ -16,7 +16,7 @@ requests==2.21.0
 setuptools==40.6.3
 ipaddr==2.2.0
 redis==2.10.6
-lxml==4.2.5
+lxml==4.9.1
 chardet==3.0.4
 sqlalchemy==1.2.15
 influxdb==5.2.1