diff --git a/ci/requirements/all-but-dask.yml b/ci/requirements/all-but-dask.yml
index 119db282ad9..abf6a88690a 100644
--- a/ci/requirements/all-but-dask.yml
+++ b/ci/requirements/all-but-dask.yml
@@ -22,7 +22,7 @@ dependencies:
   - netcdf4
   - numba
   - numbagg
-  - numpy
+  - numpy<2
   - packaging
   - pandas
   - pint>=0.22