diff --git a/setup.py b/setup.py
index caa6b10..bc87d59 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@
             'pytest-cov>=2.7,<2.12',
         ],
         'docs': [
-            'sphinx>=2.2,<3.6',
+            'sphinx>=2.2,<6.2',
             'sphinx-autobuild>=0.7,<2020.10',
             'sphinx_rtd_theme>=0.4,<0.6',
         ]