diff --git a/pyproject.toml b/pyproject.toml
index 3f9b75b..a8bcc1e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ classifiers = [
 ]
 dependencies = [
     "numpy>=1.23",
+    "xarray>=2022.6.0",
 ]
 dynamic = ["version"]