diff --git a/setup.py b/setup.py
index bd6ce2d..df7d560 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
         'Operating System :: OS Independent',
     ],
     install_requires=[
-        'lxml>=4.2.5',
+        'lxml>=4.6.4',
         'requests>=2.21.0',
         'pycryptodome>=3.7.2',
         'pyOpenSSL>=18.0.0'