diff --git a/requirements.txt b/requirements.txt
index e8712e9..2a4fc14 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ myst-parser==4.0.0
 rcssmin==1.1.2
 rjsmin==1.2.2
 shibuya==2024.7.13
-sphinx==7.4.7
+sphinx==8.0.2
 sphinx-contributors==0.2.7
 sphinx-copybutton==0.5.2
 # sphinx-design==0.5.0