diff --git a/docs/requirements.txt b/docs/requirements.txt
index 615ff5404..4adc2fa87 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -7,7 +7,7 @@ git+https://github.com/graphite-project/ceres.git#egg=ceres
 Django<6
 pyparsing>=3.0.6
 alabaster==1.0.0
-Sphinx==8.2.1
+Sphinx==9.0.0
 jinja2<3.2.0
 sphinx_rtd_theme
 urllib3