diff --git a/qfieldcloud_sdk/sdk.py b/qfieldcloud_sdk/sdk.py
index afb7e85..209adde 100644
--- a/qfieldcloud_sdk/sdk.py
+++ b/qfieldcloud_sdk/sdk.py
@@ -1956,7 +1956,7 @@ def _request(
             )
             settings = settings | session_params  # type: ignore
 
-            response = self.session.send(request.prepare(), **settings)
+            response = self.session.send(prepared_request, **settings)
 
         try:
             response.raise_for_status()