diff --git a/httpbin/filters.py b/httpbin/filters.py
index b0b16e2..494deca 100644
--- a/httpbin/filters.py
+++ b/httpbin/filters.py
@@ -13,7 +13,6 @@ from cStringIO import StringIO
 from decimal import Decimal
 from time import time as now
 
-import omnijson
 from decorator import decorator
 from flask import Flask, Response
 
@@ -21,7 +20,6 @@ from flask import Flask, Response
 app = Flask(__name__)
 
 
-
 @decorator
 def x_runtime(f, *args, **kwargs):
     """X-Runtime Flask Response Decorator."""
@@ -29,7 +27,7 @@ def x_runtime(f, *args, **kwargs):
     _t0 = now()
     r = f(*args, **kwargs)
     _t1 = now()
-    r.headers['X-Runtime'] = '{0}s'.format(Decimal(str(_t1-_t0)))
+    r.headers['X-Runtime'] = '{0}s'.format(Decimal(str(_t1 - _t0)))
 
     return r
 
@@ -38,7 +36,6 @@ def x_runtime(f, *args, **kwargs):
 def gzip(f, *args, **kwargs):
     """GZip Flask Response Decorator."""
 
-
     data = f(*args, **kwargs)
 
     if isinstance(data, Response):
diff --git a/httpbin/utils.py b/httpbin/utils.py
index 35161a6..6e2e059 100644
--- a/httpbin/utils.py
+++ b/httpbin/utils.py
@@ -10,6 +10,7 @@ Utility functions.
 import random
 import bisect
 
+
 def weighted_choice(choices):
     """Returns a value from choices chosen by weighted random selection
 
@@ -26,4 +27,4 @@ def weighted_choice(choices):
         cum_weights.append(total)
     x = random.uniform(0, total)
     i = bisect.bisect(cum_weights, x)
-    return values[i]
\ No newline at end of file
+    return values[i]