diff --git a/setup.cfg b/setup.cfg
index a37e99db..547730ae 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -49,7 +49,7 @@ install_requires =
     more-itertools
     natsort
     networkx
-    numpy
+    numpy<2
     ortools
     pybedtools
     pyefd