diff --git a/.travis.yml b/.travis.yml
index ede25d4..1205b5e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,8 +16,8 @@ deploy:
     - LICENSE
     - kwikapi/api.py
     - kwikapi/__init__.py
-  name: kwikapi-0.5.5
-  tag_name: 0.5.5
+  name: kwikapi-0.5.6
+  tag_name: 0.5.6
   on:
     repo: deep-compute/kwikapi
 - provider: pypi
diff --git a/README.md b/README.md
index d36f826..612cd5c 100644
--- a/README.md
+++ b/README.md
@@ -356,7 +356,7 @@ True
 > We can also register same methods with same namespace with different versions
 
 ### Customizing request and response
-User can change the response if he wants it
+User can change the response attributes if he wants it
 
 ```python
 >>> import json
@@ -507,6 +507,16 @@ $ wget "http://localhost:8888/api/v1/add" --header="X-KwikAPI-Protocol: messagep
 $ wget "http://localhost:8888/api/v1/subtract" --header="X-KwikAPI-Protocol: json" --post-data '{"a": 10, "b": 20}'
 $ wget "http://localhost:8888/api/v1/add" --header="X-KwikAPI-Protocol: pickle" --post-file /tmp/data.pickle
 $ wget "http://localhost:8888/api/v1/add" --header="X-KwikAPI-Protocol: numpy" --post-file /tmp/data.numpy
+$ wget "http://localhost:8888/api/v1/add?a=10&b=20" --header="X-KwikAPI-Protocol: raw"
+```
+
+#### We can also change outgoing protocol
+ex:
+```python
+class Calc(object):
+    def add(self, req: Request, a: int, b: int) -> int:
+        req.headers['X-KwikAPI-Protocol'] = 'numpy'
+        return a + b
 ```
 
 ### API Doc
diff --git a/kwikapi/api.py b/kwikapi/api.py
index de7e5c1..77ea100 100644
--- a/kwikapi/api.py
+++ b/kwikapi/api.py
@@ -520,6 +520,8 @@ def handle_request(self, request):
                 self._invoke_pre_call_hook(request)
                 result = request.fn(**request.fn_params)
 
+                protocol = self._find_request_protocol(request)
+
                 self._invoke_post_call_hook(request, result=result)
 
             except TypeError as e:
diff --git a/setup.py b/setup.py
index 4ab6421..f1f00d9 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import setup, find_packages
 
-version = '0.5.5'
+version = '0.5.6'
 setup(
     name="kwikapi",
     version=version,