diff --git a/pyproject.toml b/pyproject.toml
index 8233f6a..1ea4735 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,8 @@ dependencies = [
     "fsspec>=2023.4.0,<2024.0.0",
     "s3fs==2023.4.0,<2024.0.0",
     "zarr==2.14.2",
-    "tiledb==0.23.0"
+    "tiledb==0.23.0",
+    "numpy<2.0.0"
 ]