diff --git a/src/sfapi_client/_async/client.py b/src/sfapi_client/_async/client.py
index 8bf1b53..50d6ce1 100644
--- a/src/sfapi_client/_async/client.py
+++ b/src/sfapi_client/_async/client.py
@@ -382,12 +382,15 @@ async def get(self, url: str, params: Dict[str, Any] = {}) -> httpx.Response:
         wait=tenacity.wait_exponential(max=MAX_RETRY),
         stop=tenacity.stop_after_attempt(MAX_RETRY),
     )
-    async def post(self, url: str, data: Dict[str, Any]) -> httpx.Response:
+    async def post(
+        self, url: str, data: Dict[str, Any] = None, json: Dict[str, Any] = None
+    ) -> httpx.Response:
         client = await self._http_client()
 
         r = await client.post(
             f"{self._api_base_url}/{url}",
             data=data,
+            json=json,
         )
         r.raise_for_status()
 
diff --git a/src/sfapi_client/_sync/client.py b/src/sfapi_client/_sync/client.py
index 8aa8aaa..823ec1e 100644
--- a/src/sfapi_client/_sync/client.py
+++ b/src/sfapi_client/_sync/client.py
@@ -382,12 +382,18 @@ def get(self, url: str, params: Dict[str, Any] = {}) -> httpx.Response:
         wait=tenacity.wait_exponential(max=MAX_RETRY),
         stop=tenacity.stop_after_attempt(MAX_RETRY),
     )
-    def post(self, url: str, data: Dict[str, Any]) -> httpx.Response:
+    def post(
+        self,
+        url: str,
+        data: Dict[str, Any] = None,
+        json: Dict[str, Any] = None
+    ) -> httpx.Response:
         client = self._http_client()
 
         r = client.post(
             f"{self._api_base_url}/{url}",
             data=data,
+            json=json,
         )
         r.raise_for_status()