diff --git a/requirements.txt b/requirements.txt
index e65aef4..b41da68 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ aiohttp==3.6.2
 beautifulsoup4==4.8.0
 cachetools==3.1.1
 jsonschema==3.0.2
-lxml==4.5.0
+lxml==4.9.1
 pandas==1.0.3
 tornado==6.0.4
 requests==2.22.0