diff --git a/flatten_json.py b/flatten_json/__init__.py
similarity index 99%
rename from flatten_json.py
rename to flatten_json/__init__.py
index 9c7b68c..b44c923 100644
--- a/flatten_json.py
+++ b/flatten_json/__init__.py
@@ -10,7 +10,7 @@
 except ImportError:
     from collections import Iterable
 
-from util import check_if_numbers_are_consecutive
+from flatten_json.util import check_if_numbers_are_consecutive
 import six
 import copy
 import re
diff --git a/util.py b/flatten_json/util.py
similarity index 100%
rename from util.py
rename to flatten_json/util.py
diff --git a/test_flatten.py b/test_flatten.py
index 7f60523..9211f6e 100644
--- a/test_flatten.py
+++ b/test_flatten.py
@@ -13,7 +13,7 @@
 
 from flatten_json import flatten, flatten_preserve_lists, unflatten, \
     unflatten_list, cli
-from util import check_if_numbers_are_consecutive
+from flatten_json.util import check_if_numbers_are_consecutive
 
 
 class UnitTests(unittest.TestCase):