diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4500b36..5bae24a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-Sphinx==3.2.1
+Sphinx==9.0.4
 sphinx-rtd-theme==0.5.0
 sphinx_fontawesome==0.0.6