diff --git a/app/core/content/content_id.py b/app/core/content/content_id.py
index b976b9f..0a4d7fa 100644
--- a/app/core/content/content_id.py
+++ b/app/core/content/content_id.py
@@ -24,7 +24,7 @@ class ContentId:
         return b58encode(self.content_hash).decode()
 
     def serialize_v1(self) -> str:
-        at_bin = string_to_bytes_fixed_size(self.accept_type, 15)
+        at_bin = self.accept_type[:15]  # string_to_bytes_fixed_size(self.accept_type, 15)
         assert len(self.content_hash) == 32, "Invalid hash length"
         if self.onchain_index < 0:
             oi_bin = b''