diff --git a/modules/sdk/karrio/core/utils/helpers.py b/modules/sdk/karrio/core/utils/helpers.py
index 1292dfe1da..e785f9d9d0 100644
--- a/modules/sdk/karrio/core/utils/helpers.py
+++ b/modules/sdk/karrio/core/utils/helpers.py
@@ -174,7 +174,7 @@ def process_request(
         if raw is None:
             payload = {}
         elif isinstance(raw, (bytes, bytearray)):
-            payload = dict(data=raw)
+            payload = dict(data=bytes(raw))
         elif isinstance(raw, str):
             payload = dict(data=raw.encode("utf-8"))
         else: