diff --git a/lib/transaction/input/input.js b/lib/transaction/input/input.js
index 3a4f5b1..e01fb12 100644
--- a/lib/transaction/input/input.js
+++ b/lib/transaction/input/input.js
@@ -42,7 +42,7 @@ Input.prototype._fromObject = function(params) {
 
 Input.prototype.toObject = function toObject() {
   return {
-    prevTxId: this.prevTxId,
+    prevTxId: this.prevTxId.toString('hex'),
     outputIndex: this.outputIndex,
     sequenceNumber: this.sequenceNumber,
     script: this._scriptBuffer.toString('hex')
@@ -59,7 +59,7 @@ Input.fromJSON = function(json) {
   }
   return new Input({
     prevTxId: json.prevTxId || json.txidbuf,
-    outputIndex: json.outputIndex || json.txoutnum,
+    outputIndex: _.isUndefined(json.outputIndex) ? json.txoutnum : json.outputIndex,
     sequenceNumber: json.sequenceNumber || json.seqnum,
     scriptBuffer: new Script(json.script, 'hex')
   });
diff --git a/lib/transaction/output.js b/lib/transaction/output.js
index 759aeac..2fdd26f 100644
--- a/lib/transaction/output.js
+++ b/lib/transaction/output.js
@@ -32,15 +32,12 @@ Object.defineProperty(Output.prototype, 'satoshis', {
   configurable: false,
   writeable: true,
   get: function() {
-    if (this._satoshis.lt(1e52)) {
-      return this._satoshis.toNumber();
-    }
-    return this._satoshis;
+    return this._satoshis.toNumber();
   },
   set: function(num) {
     if (num instanceof BN) {
       this._satoshis = num;
-    } else if (_.isNumber(num)) {
+    } else {
       this._satoshis = BN().fromNumber(num);
     }
   }
diff --git a/test/transaction.js b/test/transaction.js
index 9af3b56..4ef0c84 100644
--- a/test/transaction.js
+++ b/test/transaction.js
@@ -31,6 +31,11 @@ describe('Transaction', function() {
     transaction.serialize().should.equal(tx_1_hex);
   });
 
+  it('should input/output json', function() {
+    var transaction = JSON.parse(Transaction().fromJSON(tx_1_json).toJSON());
+    transaction.should.deep.equal(JSON.parse(tx_1_json));
+  });
+
   it('should create a sample transaction from an utxo', function() {
     var transaction = new Transaction()
       .from(utxo_1a)
@@ -57,6 +62,20 @@ var tx_1_hex = '01000000015884e5db9de218238671572340b207ee85b628074e7e467096c267
 var tx_1_id = '779a3e5b3c2c452c85333d8521f804c1a52800e60f4b7c3bbe36f4bab350b72c';
 var tx_2_hex = '';
 
+var tx_1_json = JSON.stringify({
+  version:1,
+  inputs:[{
+    prevTxId:"a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458",
+    outputIndex:0,
+    sequenceNumber:4294967295,
+    script:"473044022013fa3089327b50263029265572ae1b022a91d10ac80eb4f32f291c914533670b02200d8a5ed5f62634a7e1a0dc9188a3cc460a986267ae4d58faf50c79105431327501210223078d2942df62c45621d209fab84ea9a7a23346201b7727b9b45a29c4e76f5e"}],
+  outputs:[{
+    satoshis:1010000,
+    script:"76a9147821c0a3768aa9d1a37e16cf76002aef5373f1a888ac"
+  }],
+  nLockTime:0
+});
+
 var utxo_1a_address = 'mszYqVnqKoQx4jcTdJXxwKAissE3Jbrrc1';
 
 var utxo_2a_address = 'mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc';