diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5d895fe..085c2d2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,7 +3,7 @@ furo==2024.7.18
 m2r2==0.3.3.post2
 rstcheck[sphinx]==6.2.4
 rstfmt==0.0.14
-Sphinx==7.2.6
+Sphinx==8.1.0
 sphinx-copybutton==0.5.2
 
 # install submodules