diff --git a/pyproject.toml b/pyproject.toml
index e360771..c2f95d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,8 @@ dependencies = [
     "numpy",
     "netcdf4",
     "pyproj",
-    "shapely"
+    "shapely",
+    "scipy"
 ]
 
 [build-system]