diff --git a/src/backend/core/api/serializers.py b/src/backend/core/api/serializers.py
index 5c359b13..2908b5c3 100644
--- a/src/backend/core/api/serializers.py
+++ b/src/backend/core/api/serializers.py
@@ -609,8 +609,7 @@ class ExternalProcessEventSerializer(BaseValidationOnlySerializer):
 class TransitCodeSerializer(BaseValidationOnlySerializer):
     """Validate the single-use transit code sent to the exchange endpoint."""
 
-    # todo if I can pass the max length directly to the char field
-    code = serializers.CharField(max_length=255, trim_whitespace=True)
+    code = serializers.CharField(trim_whitespace=True)
 
     def validate_code(self, value):
         """Reject codes whose length cannot match a generated one.