diff --git a/requirements.txt b/requirements.txt
index 386ec0d..f6136d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 flask==1.1.1
 gunicorn==19.9.0
 requests==2.22.0
-lxml==4.1.1
+lxml==4.6.2
 flask_cors==3.0.3
 git+git://github.com/kirill578/Python-LRU-cache.git
 firebase-admin==2.13.0