diff --git a/runtests.py b/runtests.py
old mode 100644
new mode 100755
index 6c186bb..a6a917e
--- a/runtests.py
+++ b/runtests.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import os, sys
diff --git a/setup.py b/setup.py
old mode 100644
new mode 100755
index 25a2bae..1e11a8e
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 from setuptools import setup, find_packages
 
 description="""
diff --git a/tests/pg_json_fields/tests.py b/tests/pg_json_fields/tests.py
index fb8f31c..04fb139 100644
--- a/tests/pg_json_fields/tests.py
+++ b/tests/pg_json_fields/tests.py
@@ -64,6 +64,11 @@ def test_primitives_null(self):
         obj = self.model_class.objects.get(pk=obj.pk)
         self.assertEqual(obj.data, None)
 
+    def test_dict_with_int_key(self):
+        obj = self.model_class.objects.create(data={10: 5})
+        obj = self.model_class.objects.get(pk=obj.pk)
+        self.assertDictEqual(obj.data, {10: 5})
+
     def test_value_to_string_serializes_correctly(self):
         obj = self.model_class.objects.create(data={"a": 1})