diff --git a/rpc/src/main/scala/org/bitcoins/rpc/serializers/JsonWriters.scala b/rpc/src/main/scala/org/bitcoins/rpc/serializers/JsonWriters.scala
index 06321042fd..bf7d8ebbe7 100644
--- a/rpc/src/main/scala/org/bitcoins/rpc/serializers/JsonWriters.scala
+++ b/rpc/src/main/scala/org/bitcoins/rpc/serializers/JsonWriters.scala
@@ -30,7 +30,7 @@ object JsonWriters {
   implicit object TransactionInputWrites extends Writes[TransactionInput] {
     override def writes(o: TransactionInput): JsValue =
       JsObject(
-        Seq(("txid", JsString(o.previousOutput.txId.hex)),
+        Seq(("txid", JsString(o.previousOutput.txId.flip.hex)),
             ("vout", JsNumber(o.previousOutput.vout.toLong)),
             ("sequence", JsNumber(o.sequence.toLong))))
   }