diff --git a/src/lib/services/types/tx.ts b/src/lib/services/types/tx.ts
index 4cd989b1e..33b93555f 100644
--- a/src/lib/services/types/tx.ts
+++ b/src/lib/services/types/tx.ts
@@ -447,7 +447,7 @@ export const zTxJsonRpc = z.object({
   v: z.string(),
   r: z.string(),
   s: z.string(),
-  yParity: z.string(),
+  yParity: z.string().optional(),
 });
 
 export const zTxReceiptJsonRpc = z.object({