diff --git a/requirements/base.txt b/requirements/base.txt
index e36a92c6..bf613c8f 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -5,7 +5,7 @@
 cryptography==3.3.2
 defusedxml==0.6.0
 jsonschema==3.2.0
-lxml==4.6.2
+lxml==4.6.3
 marshmallow==2.19.5
 pydantic==1.6.1
 pyOpenSSL==18.0.0