diff --git a/pipedream_solver/nquality.py b/pipedream_solver/nquality.py
index 0818254..c68bde0 100644
--- a/pipedream_solver/nquality.py
+++ b/pipedream_solver/nquality.py
@@ -101,7 +101,7 @@ def __init__(self, hydraulics, superjunction_params, superlink_params,
         self._kI = self.hydraulics._kI
         self._K_j = superjunction_params['K'].values.astype(np.float64)
         self._c_j = superjunction_params['c_0'].values.astype(np.float64)
-        self.bc = superjunction_params['bc'].values.astype(np.bool8)
+        self.bc = superjunction_params['bc'].values.astype(np.bool_)
         if junction_params is not None:
             self._K_Ik = junction_params['K'].values.astype(np.float64)
             self._c_Ik = junction_params['c_0'].values.astype(np.float64)
diff --git a/pipedream_solver/nsuperlink.py b/pipedream_solver/nsuperlink.py
index 107355e..829d03f 100644
--- a/pipedream_solver/nsuperlink.py
+++ b/pipedream_solver/nsuperlink.py
@@ -1679,7 +1679,7 @@ def reposition_junctions(self, reposition=None):
         _H_dk = H_j[_J_dk]
         # Handle which superlinks to reposition
         if reposition is None:
-            reposition = np.ones(NK, dtype=np.bool8)
+            reposition = np.ones(NK, dtype=np.bool_)
         # Reposition junctions
         numba_reposition_junctions(_x_Ik, _z_inv_Ik, _h_Ik, _dx_ik, _Q_ik, _H_dk,
                                     _b0, _zc, _xc, _m, _elem_pos, _i_1k, _I_1k,