diff --git a/src/britive/__init__.py b/src/britive/__init__.py
index a3daa5f..b90d428 100644
--- a/src/britive/__init__.py
+++ b/src/britive/__init__.py
@@ -1 +1 @@
-__version__ = '4.5.0rc1'
+__version__ = '4.5.0rc2'
diff --git a/src/britive/my_access.py b/src/britive/my_access.py
index 8932aa4..32964ac 100644
--- a/src/britive/my_access.py
+++ b/src/britive/my_access.py
@@ -336,6 +336,7 @@ def _checkout(
                 transaction=transaction,
                 return_transaction_details=True,
                 progress_func=progress_func,
+                headers=headers,
             )
             transaction['credentials'] = credentials