diff --git a/setup.py b/setup.py
index 12aebd5..b3fe680 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@
 
 extras_require = {
     'docs': [
-        'Sphinx>=3',
+        'Sphinx>=4.5.0',
     ],
     'tests': tests_require,
 }
@@ -40,7 +40,7 @@
 
 install_requires = [
     'jsonschema>=3.0.0',
-    'lxml>=4.5.0',
+    'lxml>=4.5.2',
     'requests>=2.12.2',
     'idutils>=1.0.0'
 ]