diff --git a/docs/docs_requirements.txt b/docs/docs_requirements.txt
index 0c435ed..2d6a76f 100644
--- a/docs/docs_requirements.txt
+++ b/docs/docs_requirements.txt
@@ -1,3 +1,3 @@
-Sphinx==1.8.1
+Sphinx==9.1.0
 Pygments==2.7.4
-Sphinx==1.8.1
+Sphinx==9.1.0