diff --git a/pytential/qbx/__init__.py b/pytential/qbx/__init__.py
index 8961659e67dc44fb46379185a21509697739813a..2d85ee1036117363cccffdf5c2eee81da57c4fcc 100644
--- a/pytential/qbx/__init__.py
+++ b/pytential/qbx/__init__.py
@@ -470,7 +470,7 @@ class QBXLayerPotentialSource(LayerPotentialSourceBase):
     def h_max(self):
         with cl.CommandQueue(self.cl_context) as queue:
             quad_res = self._coarsest_quad_resolution("npanels").with_queue(queue)
-            return np.asscalar(cl.array.max(quad_res).get())
+            return cl.array.max(quad_res).get().item()
 
     # {{{ internal API
 
diff --git a/pytential/qbx/geometry.py b/pytential/qbx/geometry.py
index ee4421848fb7ba0388e76682be256727d47313ac..4eadefbe8c2b8f1e31e79f0af266d7e9dc11c79b 100644
--- a/pytential/qbx/geometry.py
+++ b/pytential/qbx/geometry.py
@@ -779,7 +779,7 @@ class QBXFMMGeometryData(object):
                     tree_ttc, filtered_tree_ttc, filtered_target_ids, count,
                     queue=queue, size=len(tree_ttc))
 
-            count = np.asscalar(count.get())
+            count = count.get().item()
 
             filtered_tree_ttc = filtered_tree_ttc[:count]
             filtered_target_ids = filtered_target_ids[:count].copy()