diff --git a/backend/develop-requirements.txt b/backend/develop-requirements.txt
index 75de40c..7b1e2e1 100644
--- a/backend/develop-requirements.txt
+++ b/backend/develop-requirements.txt
@@ -30,7 +30,7 @@ pytest-docker ==3.2.5
 pytest-order ==1.3.0
 
 # Sphinx is used to generate documentation from Python docstrings and reStructured text.
-sphinx >=9.0.0,<10.0.0
+sphinx >=9.1.0,<10.0.0
 
 # Alembic for managing the db migrations. This should match the version from the alembic-requirements.txt
 # file, though that can't be used because it forces hash checking which, in turn, collides with the