diff --git a/setup.cfg b/setup.cfg
index 23bb5ce36..ee5e9ad7b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -44,7 +44,7 @@ zip_safe = False
 packages = sphinx_rtd_theme
 python_requires = >=3.8
 install_requires = 
-	sphinx >=6,<9
+	sphinx >=8.1,<9
 	docutils >0.18,<0.22
 	sphinxcontrib-jquery >=4,<5
 tests_require =