diff --git a/python/triqs_maxent/functions.py b/python/triqs_maxent/functions.py
index b34e929..6b00e27 100644
--- a/python/triqs_maxent/functions.py
+++ b/python/triqs_maxent/functions.py
@@ -58,8 +58,8 @@ def safelog(A):
 
 def view_complex(A, reshape=True):
     if not reshape:
-        return A.view(np.complex_)
-    return A.view(np.complex_).reshape(A.shape[:-1])
+        return A.view(np.complex128)
+    return A.view(np.complex128).reshape(A.shape[:-1])
 
 
 def view_real(A, reshape=True):
diff --git a/test/python/set_G_tau_complex_matrix.py b/test/python/set_G_tau_complex_matrix.py
index 671377b..671c278 100644
--- a/test/python/set_G_tau_complex_matrix.py
+++ b/test/python/set_G_tau_complex_matrix.py
@@ -70,7 +70,7 @@ def numpy_assert(a, b, dec): return np.testing.assert_almost_equal(
         # this is necessary in TRIQS 2.1 but will fail in 1.4
         from triqs.gf.gf_fnt import replace_by_tail
         tail, err = G_iw_rot.fit_tail(
-            known_moments=np.zeros((1, 2, 2), dtype=np.complex_))
+            known_moments=np.zeros((1, 2, 2), dtype=np.complex128))
         replace_by_tail(G_iw_rot, tail, 200)
     except:
     	pass