diff --git a/ate/__init__.py b/ate/__init__.py
index 08d79c0e..f93e0653 100644
--- a/ate/__init__.py
+++ b/ate/__init__.py
@@ -1 +1 @@
-__version__ = '0.5.1'
\ No newline at end of file
+__version__ = '0.5.2'
\ No newline at end of file
diff --git a/ate/client.py b/ate/client.py
index a6d29ea0..81ca0ace 100644
--- a/ate/client.py
+++ b/ate/client.py
@@ -1,17 +1,27 @@
+import json
 import logging
 import re
 import time
 
 import requests
+from ate.exception import ParamsError
 from requests import Request, Response
 from requests.exceptions import (InvalidSchema, InvalidURL, MissingSchema,
                                  RequestException)
 
-from ate.exception import ParamsError
-
 absolute_http_url_regexp = re.compile(r"^https?://", re.I)
 
 
+def process_kwargs(method, **kwargs):
+    if method == "POST":
+        # if request content-type is application/json, request data should be dumped
+        content_type = kwargs.get("headers", {}).get("content-type", "")
+        if content_type.startswith("application/json") and "data" in kwargs:
+            kwargs["data"] = json.dumps(kwargs["data"])
+
+    return kwargs
+
+
 class ApiResponse(Response):
 
     def raise_for_status(self):
@@ -142,6 +152,7 @@ class HttpSession(requests.Session):
         Safe mode has been removed from requests 1.x.
         """
         try:
+            kwargs = process_kwargs(method, **kwargs)
             return requests.Session.request(self, method, url, **kwargs)
         except (MissingSchema, InvalidSchema, InvalidURL):
             raise
diff --git a/tests/test_client.py b/tests/test_client.py
index b6ac1009..6e13f47a 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -1,4 +1,4 @@
-from ate.client import HttpSession
+from ate.client import HttpSession, process_kwargs
 from tests.base import ApiServerUnittest
 
 class TestHttpClient(ApiServerUnittest):
@@ -35,3 +35,16 @@ class TestHttpClient(ApiServerUnittest):
         resp = self.api_client.post(url, json=data, headers=self.headers)
         self.assertEqual(201, resp.status_code)
         self.assertEqual(True, resp.json()['success'])
+
+    def test_process_kwargs(self):
+        kwargs = {
+            "headers": {
+                "content-type": "application/json; charset=utf-8"
+            },
+            "data": {
+                "a": 1,
+                "b": 2
+            }
+        }
+        kwargs = process_kwargs("POST", **kwargs)
+        self.assertEqual(kwargs["data"], '{"a": 1, "b": 2}')