diff --git a/pyproject.toml b/pyproject.toml
index f070d9a..6154208 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ description = "UMEP requirements package"
 authors = [{ name = "UMEP dev team" }]
 dependencies = [
     "timezonefinder==6.5.9",
-    "supy==2025.7.9.dev0",
+    "supy==2026.1.28rc1",
     "numba==0.59.0",
     "jaydebeapi==1.2.3",
     "netCDF4",