diff --git a/requirements.txt b/requirements.txt
index adb09f3307..c119644ca9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ requests==2.32.3
 reuse==4.0.3
 snowballstemmer==2.2.0
 soupsieve==2.6
-Sphinx==8.0.2
+Sphinx==8.1.3
 sphinx-book-theme==1.1.3
 sphinxcontrib-applehelp==2.0.0
 sphinxcontrib-devhelp==2.0.0