diff --git a/autoconf/__init__.py b/autoconf/__init__.py
index c861e3c..276e3dd 100644
--- a/autoconf/__init__.py
+++ b/autoconf/__init__.py
@@ -7,4 +7,4 @@
 from .json_prior.config import path_for_class
 from .json_prior.config import JSONPriorConfig
 
-__version__ = "2023.7.5.2"
+__version__ = "2023.9.18.4"
diff --git a/requirements.txt b/requirements.txt
index f4ed9eb..cf22618 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 typing-inspect>=0.4.0
 PyYAML>=6.0.1
-numpy<=1.23.5
+numpy<=1.26.0