diff --git a/.gitignore b/.gitignore
index a559267..7c86978 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
+env/
 .workon
-.epio-app
\ No newline at end of file
+.epio-app
+*.pyc
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 1270594..bf31477 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,3 +13,4 @@ newrelic==1.2.1.265
 raven==1.9.3
 simplejson==2.4.0
 wsgiref==0.1.2
+gevent
\ No newline at end of file
diff --git a/test_httpbin.py b/test_httpbin.py
index 8b99322..ba39aac 100755
--- a/test_httpbin.py
+++ b/test_httpbin.py
@@ -21,7 +21,7 @@ class HttpbinTestCase(unittest.TestCase):
     def test_base64(self):
         greeting = u'Здравствуй, мир!'
         b64_encoded = _string_to_base64(greeting)
-        response = self.app.get('/base64/{}'.format(b64_encoded))
+        response = self.app.get('/base64/{0}'.format(b64_encoded))
         content = response.data.decode('utf-8')
         self.assertEquals(greeting, content)