diff --git a/setup.py b/setup.py
index f8346b8c581f9a6f086eb081cf3c1e1dfcec5322..06133d5bb93e35b6f33240e544cae2b09ce2cc08 100755
--- a/setup.py
+++ b/setup.py
@@ -158,7 +158,7 @@ def setup_package():
         install_requires=["linkahead>=0.13.1",
                           "jsonref",
                           "jsonschema[format]>=4.4.0",
-                          "numpy>=1.24.0",
+                          "numpy>=1.24.0, < 2",
                           "openpyxl>=3.0.7",
                           "pandas>=1.2.0",
                           "xlrd>=2.0",