diff --git a/src/sc3D/sc3D.py b/src/sc3D/sc3D.py
index 82728ad..eee30fc 100644
--- a/src/sc3D/sc3D.py
+++ b/src/sc3D/sc3D.py
@@ -2378,7 +2378,7 @@ def compute_volumes(self, tissues_to_treat=None, bead_size=(10, 10, 30)):
             tissues_to_treat = self.all_tissues
 
         volumes = {}
-        bead_volume = np.product(bead_size)
+        bead_volume = np.prod(bead_size)
         for t in tissues_to_treat:
             volumes[self.corres_tissue.get(t, t)] = (
                 len(self.cells_from_tissue.get(t, [])) * bead_volume