diff --git a/cheta/converters.py b/cheta/converters.py
index 8ce15689..03473551 100644
--- a/cheta/converters.py
+++ b/cheta/converters.py
@@ -74,8 +74,8 @@ def _convert(dat):
 
         if add_quality:
             descrs = [(x,) + y[1:] for x, y in zip(colnames_out, dat.dtype.descr)]
-            quals = numpy.zeros((len(dat), len(colnames) + 1), dtype=numpy.bool)
-            descrs += [("QUALITY", numpy.bool, (len(colnames) + 1,))]
+            quals = numpy.zeros((len(dat), len(colnames) + 1), dtype=bool)
+            descrs += [("QUALITY", bool, (len(colnames) + 1,))]
             arrays += [quals]
         else:
             descrs = [
@@ -563,7 +563,7 @@ def acisdeahk(dat):
         quality = (False, False) + bads
         outs.append((times[i0], quality) + vals)
 
-    dtype = [("TIME", numpy.float64), ("QUALITY", numpy.bool, (len(col_names) + 2,))]
+    dtype = [("TIME", numpy.float64), ("QUALITY", bool, (len(col_names) + 2,))]
     dtype += [(col_name, numpy.float32) for col_name in col_names]
 
     return numpy.rec.fromrecords(outs, dtype=dtype)
diff --git a/cheta/update_archive.py b/cheta/update_archive.py
index 97bc23f0..f5093a1d 100755
--- a/cheta/update_archive.py
+++ b/cheta/update_archive.py
@@ -1001,7 +1001,7 @@ def read_derived(i, filename, filetype, row, colnames, archfiles, db):
 
     logger.info("Reading (%d / %d) %s" % (i, len(archfiles), filename))
     vals = {}
-    bads = np.zeros((len(times), len(colnames)), dtype=np.bool)
+    bads = np.zeros((len(times), len(colnames)), dtype=bool)
     for i, colname in enumerate(colnames):
         if colname == "TIME":
             vals[colname] = times