diff --git a/ci/upstream.yml b/ci/upstream.yml
index 29f91041..ac3e9674 100644
--- a/ci/upstream.yml
+++ b/ci/upstream.yml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  - xarray>=2024.10.0
+  - xarray>=2024.10.0,<2025.0.0
   - h5netcdf
   - h5py
   - hdf5
diff --git a/pyproject.toml b/pyproject.toml
index d159cb70..e45ca563 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers = [
 requires-python = ">=3.10"
 dynamic = ["version"]
 dependencies = [
-    "xarray>=2024.10.0",
+    "xarray>=2024.10.0,<2025.0.0",
     "numpy>=2.0.0",
     "packaging",
     "universal-pathlib",