diff --git a/oxdjango/middleware.py b/oxdjango/middleware.py
index 66d6be9..83e6be3 100644
--- a/oxdjango/middleware.py
+++ b/oxdjango/middleware.py
@@ -5,9 +5,9 @@ from shortcuts import Http404Json, render_to_json_response
 
 class ExceptionMiddleware(object):
 
-  def process_exception(self, request, exception):
-    if isinstance(exception, Http404Json):     
-      return render_to_json_response(exception.response)          
-    else:
-      return None
+    def process_exception(self, request, exception):
+        if isinstance(exception, Http404Json):     
+            return render_to_json_response(exception.response)          
+        else:
+            return None