diff --git a/apps/authentication/backends/oauth2/backends.py b/apps/authentication/backends/oauth2/backends.py
index 0c40d09bd..16a617b16 100644
--- a/apps/authentication/backends/oauth2/backends.py
+++ b/apps/authentication/backends/oauth2/backends.py
@@ -98,16 +98,19 @@ class OAuth2Backend(JMSModelBackend):
         access_token_url = '{url}{separator}{query}'.format(
             url=settings.AUTH_OAUTH2_ACCESS_TOKEN_ENDPOINT, separator=separator, query=urlencode(query_dict)
         )
+        # token_method -> get, post(post_data), post_json
         token_method = settings.AUTH_OAUTH2_ACCESS_TOKEN_METHOD.lower()
-        requests_func = getattr(requests, token_method, requests.get)
         logger.debug(log_prompt.format('Call the access token endpoint[method: %s]' % token_method))
         headers = {
             'Accept': 'application/json'
         }
-        if token_method == 'post':
-            access_token_response = requests_func(access_token_url, headers=headers, data=query_dict)
+        if token_method.startswith('post'):
+            body_key = 'json' if token_method.endswith('json') else 'data'
+            access_token_response = requests.post(
+                access_token_url, headers=headers, **{body_key: query_dict}
+            )
         else:
-            access_token_response = requests_func(access_token_url, headers=headers)
+            access_token_response = requests.get(access_token_url, headers=headers)
         try:
             access_token_response.raise_for_status()
             access_token_response_data = access_token_response.json()
diff --git a/apps/settings/serializers/auth/oauth2.py b/apps/settings/serializers/auth/oauth2.py
index 56ddd6a66..b5a0dbb62 100644
--- a/apps/settings/serializers/auth/oauth2.py
+++ b/apps/settings/serializers/auth/oauth2.py
@@ -43,7 +43,7 @@ class OAuth2SettingSerializer(serializers.Serializer):
     )
     AUTH_OAUTH2_ACCESS_TOKEN_METHOD = serializers.ChoiceField(
         default='GET', label=_('Client authentication method'),
-        choices=(('GET', 'GET'), ('POST', 'POST'))
+        choices=(('GET', 'GET'), ('POST', 'POST-DATA'), ('POST_JSON', 'POST-JSON'))
     )
     AUTH_OAUTH2_PROVIDER_USERINFO_ENDPOINT = serializers.CharField(
         required=True, max_length=1024, label=_('Provider userinfo endpoint')