--- a/astropy_healpix/core.py	2018-12-19 03:23:52.000000000 +0800
+++ b/astropy_healpix/core.py	2019-02-23 19:07:17.514787248 +0800
@@ -38,9 +38,9 @@
             return args[0].reshape(shape)
     else:
         if len(args) > 1:
-            return [np.asscalar(arg) for arg in args]
+            return [arg.item() for arg in args]
         else:
-            return np.asscalar(args[0])
+            return args[0].item()
 
 
 def _validate_order(order):
--- a/astropy_healpix/healpy.py	2018-12-19 03:23:52.000000000 +0800
+++ b/astropy_healpix/healpy.py	2019-02-23 19:11:40.427182742 +0800
@@ -121,8 +121,8 @@
     theta, phi = vec2ang(np.transpose([x, y, z]))
     # hp.vec2ang() returns raveled arrays, which are 1D.
     if np.isscalar(x):
-        theta = np.asscalar(theta)
-        phi = np.asscalar(phi)
+        theta = theta.item()
+        phi = phi.item()
     else:
         shape = np.shape(x)
         theta = theta.reshape(shape)