diff --git a/aiosmtpd/docs/requirements.txt b/aiosmtpd/docs/requirements.txt
index b42c28fd..98067836 100644
--- a/aiosmtpd/docs/requirements.txt
+++ b/aiosmtpd/docs/requirements.txt
@@ -1,6 +1,6 @@
 -r ../../requirements.txt
 
 ### Sphinx deps
-sphinx==7.4.6
+sphinx==8.1.0
 sphinx-autofixture==0.4.0
 sphinx_rtd_theme==3.0.1