diff --git a/requirements.txt b/requirements.txt
index eafaa91..775f0bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ elasticsearch==2.4.0
 jieba==0.38
 jsonfield==1.0.3
 kombu==3.0.35
-lxml==3.6.4
+lxml==4.9.1
 mysqlclient==1.3.7
 networkx==1.11
 nltk==3.2.1