diff --git a/setup.cfg b/setup.cfg
index e1de34c..cea7405 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~=3.2.1
+    sphinx>=3.2.1,<8.1.0
     sphinx-rtd-theme~=0.5.0
     tox~=4.11.0
     types-setuptools~=68.1.0.0