diff --git a/src/schemas/transaction.yaml b/src/schemas/transaction.yaml
index 52a9b5928..c95a2838a 100644
--- a/src/schemas/transaction.yaml
+++ b/src/schemas/transaction.yaml
@@ -17,7 +17,8 @@ Transaction4844Unsigned:
   properties:
     type:
       title: type
-      $ref: '#/components/schemas/byte'
+      type: string
+      pattern: ^0x3$
     nonce:
       title: nonce
       $ref: '#/components/schemas/uint'