diff --git a/pyproject.toml b/pyproject.toml
index a7ad687f7..5a25a2dba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ dependencies = [
     "jinja2",
     # If you update the minimum required jsonschema version, also update it in build.yml
     "jsonschema>=3.0",
-    "numpy",
+    "numpy<2.0.0",
     # If you update the minimum required pandas version, also update it in build.yml
     "pandas>=0.25",
     "toolz",