diff --git a/requirements_dev.txt b/requirements_dev.txt
index 880f78c61..db55315d5 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -12,7 +12,7 @@ pytest-mock==3.17.0
 recommonmark==0.7.1
 requests==2.34.2
 requests-mock==1.12.1
-sphinx==8.1.3
+sphinx==9.0.4
 sphinx-rtd-theme==3.1.0
 tqdm==4.70.1
 websocket-client==1.9.2