diff --git a/py-polars/requirements-dev.txt b/py-polars/requirements-dev.txt
index 89c081de50c3..162ec2f817c6 100644
--- a/py-polars/requirements-dev.txt
+++ b/py-polars/requirements-dev.txt
@@ -16,7 +16,8 @@ pip
 # ------------
 
 # Interop
-numpy
+# TODO: Fix typing issues for newer NumPy versions
+numpy < 2.1
 numba >= 0.54; python_version < '3.13'  # Numba can lag Python releases
 pandas
 pyarrow