diff --git a/python/bifrost/header_standard.py b/python/bifrost/header_standard.py
index df438e01f..11428fe8a 100644
--- a/python/bifrost/header_standard.py
+++ b/python/bifrost/header_standard.py
@@ -53,13 +53,13 @@
 # Format:
 # 'parameter name':(type, minimum)
 STANDARD_HEADER = {
-    'nchans': ((int, np.int64),     1),
-    'nifs':   ((int, np.int64),     1),
-    'nbits':  ((int, np.int64),     1),
-    'fch1':   ((float, np.float64), 0),
-    'foff':   ((float, np.float64), None),
-    'tstart': ((float, np.float64), 0),
-    'tsamp':  ((float, np.float64), 0)}
+    'nchans': ((int,   np.integer),  1),
+    'nifs':   ((int,   np.integer),  1),
+    'nbits':  ((int,   np.integer),  1),
+    'fch1':   ((float, np.floating), 0),
+    'foff':   ((float, np.floating), None),
+    'tstart': ((float, np.floating), 0),
+    'tsamp':  ((float, np.floating), 0)}
 
 def enforce_header_standard(header_dict):
     """Raise an error if the header dictionary passed
diff --git a/test/test_header_standard.py b/test/test_header_standard.py
index b32598b68..ff87aae1c 100644
--- a/test/test_header_standard.py
+++ b/test/test_header_standard.py
@@ -48,9 +48,9 @@ def test_simple_header(self):
     def test_numpy_types(self):
         """Same values, but some are numpy types"""
         self.header_dict = {
-            'nchans': np.int64(1), 'nifs': 1, 'nbits': 8,
-            'fch1': np.float64(100.0), 'foff': np.float64(1e-5),
-            'tstart': 1e5, 'tsamp': np.float64(1e-5)}
+            'nchans': np.int32(1), 'nifs': 1, 'nbits': 8,
+            'fch1': np.float32(100.0), 'foff': np.float64(1e-5),
+            'tstart': 1e5, 'tsamp': np.float32(1e-5)}
     def test_extra_parameters(self):
         """Add some extra parameters"""
         self.header_dict = {