diff --git a/httpbin/core.py b/httpbin/core.py
index e631b85..79086b9 100644
--- a/httpbin/core.py
+++ b/httpbin/core.py
@@ -537,7 +537,7 @@ def stream_random_bytes(n):
             yield(bytes(chunks))
 
     headers = {'Transfer-Encoding': 'chunked',
-               'Content-Type': 'application/octet-stream' }
+               'Content-Type': 'application/octet-stream'}
 
     return Response(generate_bytes(), headers=headers)