diff --git a/docs/requirements.txt b/docs/requirements.txt
index ab2101d..d4a3abe 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,5 +3,5 @@ furo==2025.12.19
 myst-parser==4.0.1
 rstcheck[sphinx]==6.2.5
 rstfmt==0.0.14
-Sphinx==8.2.3
+Sphinx==9.0.4
 sphinx-copybutton==0.5.2