diff --git a/ai_oca_bridge/controllers/ai.py b/ai_oca_bridge/controllers/ai.py
index 06668ec9..c11fe061 100644
--- a/ai_oca_bridge/controllers/ai.py
+++ b/ai_oca_bridge/controllers/ai.py
@@ -37,7 +37,7 @@ def ai_process_response(self, execution_id, token):
                 execution._process_response(
                     json.loads(
                         request.httprequest.get_data().decode(
-                            request.httprequest.charset
+                            getattr(request.httprequest, "charset", None) or "utf-8"
                         )
                     )
                 )