diff --git a/gov_track_hk_web/requirements.txt b/gov_track_hk_web/requirements.txt
index b8c2360..d91b6eb 100644
--- a/gov_track_hk_web/requirements.txt
+++ b/gov_track_hk_web/requirements.txt
@@ -9,7 +9,7 @@ demjson==2.2.4
 django-dirtyfields==1.0
 djangorestframework==3.7.7
 jieba==0.38
-lxml==3.6.0
+lxml==4.9.1
 pyparsing==2.1.8
 pyquery==1.2.13
 python-dateutil==2.5.3