diff --git a/setup.cfg b/setup.cfg
index 90f8bb8..84bc369 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -71,7 +71,7 @@ dev =
     pytest-watch~=4.2.0
     pytest-xdist~=3.3.1
     pre-commit~=3.3.3
-    sphinx~=7.2.6
+    sphinx>=7.2.6,<8.1.0
     sphinx-rtd-theme~=2.0.0
     tox~=4.11.0
     types-setuptools>=68.1.0,<74.1.1