diff --git a/docs/requirements.txt b/docs/requirements.txt
index 589074f6..41a1d878 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -5,7 +5,7 @@
 #imagecodecs == 2023.9.18
 #Jinja2 == 3.1.6
 
-sphinx==7.2.6
+sphinx==9.0.4
 sphinx_rtd_theme==3.1.0
 readthedocs-sphinx-search==0.3.2
 imagecodecs == 2023.9.18