diff --git a/py-polars/pyproject.toml b/py-polars/pyproject.toml
index 856eb2c0eb02d..864b116947f26 100644
--- a/py-polars/pyproject.toml
+++ b/py-polars/pyproject.toml
@@ -49,7 +49,9 @@ fsspec = ["fsspec"]
 gevent = ["gevent"]
 iceberg = ["pyiceberg >= 0.5.0"]
 matplotlib = ["matplotlib"]
-numpy = ["numpy >= 1.16.0"]
+# TODO: Remove upper bound when we support 2.0
+# https://github.com/pola-rs/polars/issues/16998
+numpy = ["numpy >= 1.16.0, < 2.0.0"]
 openpyxl = ["openpyxl >= 3.0.0"]
 pandas = ["pyarrow >= 7.0.0", "pandas"]
 plot = ["hvplot >= 0.9.1"]