diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 921fdd6..7415c7d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,6 +33,7 @@ jobs:
         run: make run_tests
 
       - name: Upload coverage to Coveralls
+        if: ${{ matrix.python-version }} == "3.12"
         uses: coverallsapp/github-action@v2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/supabase_functions/_async/functions_client.py b/supabase_functions/_async/functions_client.py
index 7c5cced..42d8d20 100644
--- a/supabase_functions/_async/functions_client.py
+++ b/supabase_functions/_async/functions_client.py
@@ -47,7 +47,10 @@ async def _request(
         headers: Optional[Dict[str, str]] = None,
         json: Optional[Dict[Any, Any]] = None,
     ) -> Response:
-        response = await self._client.request(method, url, json=json, headers=headers)
+
+        user_data = {"data": json} if isinstance(json, str) else {"json": json}
+        response = await self._client.request(method, url, **user_data, headers=headers)
+
         try:
             response.raise_for_status()
         except HTTPError as exc:
diff --git a/supabase_functions/_sync/functions_client.py b/supabase_functions/_sync/functions_client.py
index 1168bdf..99780eb 100644
--- a/supabase_functions/_sync/functions_client.py
+++ b/supabase_functions/_sync/functions_client.py
@@ -47,7 +47,10 @@ def _request(
         headers: Optional[Dict[str, str]] = None,
         json: Optional[Dict[Any, Any]] = None,
     ) -> Response:
-        response = self._client.request(method, url, json=json, headers=headers)
+
+        user_data = {"data": json} if isinstance(json, str) else {"json": json}
+        response = self._client.request(method, url, **user_data, headers=headers)
+
         try:
             response.raise_for_status()
         except HTTPError as exc: