diff --git a/.gitignore b/.gitignore
index 8ea3204..542467b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,7 @@ build
 *.pyc
 *.c
 *.so
+*.egg-info/
 
 # OS or Editor folders
 .DS_Store
diff --git a/deepdish/core.py b/deepdish/core.py
index 3782a21..d242bc8 100644
--- a/deepdish/core.py
+++ b/deepdish/core.py
@@ -5,7 +5,7 @@
 import itertools as itr
 import sys
 from contextlib import contextmanager
-warnings.simplefilter("ignore", np.ComplexWarning)
+warnings.simplefilter("ignore", np.exceptions.ComplexWarning)
 
 _is_verbose = False
 _is_silent = False
diff --git a/deepdish/io/hdf5io.py b/deepdish/io/hdf5io.py
index 372ee7b..ac4712e 100644
--- a/deepdish/io/hdf5io.py
+++ b/deepdish/io/hdf5io.py
@@ -112,13 +112,13 @@ def _get_compression_filters(compression='default'):
 
 
 def _save_ndarray(handler, group, name, x, filters=None):
-    if np.issubdtype(x.dtype, np.unicode_):
+    if np.issubdtype(x.dtype, np.str_):
         # Convert unicode strings to pure byte arrays
         strtype = b'unicode'
         itemsize = x.itemsize // 4
         atom = tables.UInt8Atom()
         x = x.view(dtype=np.uint8)
-    elif np.issubdtype(x.dtype, np.string_):
+    elif np.issubdtype(x.dtype, np.bytes_):
         strtype = b'ascii'
         itemsize = x.itemsize
         atom = tables.StringAtom(itemsize)