diff --git a/setup.py b/setup.py
index ee5848eb6..b415d4187 100644
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,7 @@
         'test': ['factory_boy==3.2.0'],
         'docs': [
             'recommonmark~=0.7',
-            'sphinx~=4.0',
+            'sphinx>=4,<7',
             'tom_antares',
             'tom_scimma'
         ]