diff --git a/src/dem2basin/dem2basin.py b/src/dem2basin/dem2basin.py
index a7be2c4..686c52a 100644
--- a/src/dem2basin/dem2basin.py
+++ b/src/dem2basin/dem2basin.py
@@ -1149,7 +1149,7 @@ def get_bounding_boxes_by_project(
             rasterio.open(dem_tilename).bounds
         ))
 
-    dem_tiles = gpd.DataFrame(
+    dem_tiles = gpd.GeoDataFrame(
         dem_tile_bounds,
         columns = ['lidar_file','bounds']
     )