diff --git a/pyproject.toml b/pyproject.toml
index a9f3c5bd8..0f482b960 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ dependencies = [
     # Core scientific computing
     "numpy >= 1.21.5, < 3",
     "pandas >= 2.0.0, < 3",
-    "xarray >=2024.2.0, <2026.2", # CalVer: allow through next calendar year
+    "xarray >=2024.2.0, <2026.3", # CalVer: allow through next calendar year
     # Optimization and data handling
     "linopy >= 0.5.1, < 0.6", # Widened from patch pin to minor range
     "netcdf4 >=1.6.1, <1.7.5",  # 1.7.4 missing wheels, revert to < 2 later