diff --git a/index.html b/index.html
index 3af517d..ad8334c 100644
--- a/index.html
+++ b/index.html
@@ -159,6 +159,11 @@
 												<p class="checkbox">
 													<label><input type="checkbox" id="walletSegwit" class="checkbox-inline" checked> Use a segwit address instead of a regular address. <span class="text-muted"><i>(recommended)</i></span></label></label>
 												</p>
+
+												<label>Enable Replace by Fee (RBF)</label>
+												<p class="checkbox">
+													<label><input type="checkbox" id="walletRBF" class="checkbox-inline" checked> Enable RBF on all transactions, allowing the user to manually bump the transaction later if required. <span class="text-muted"><i>(recommended)</i></span></label></label>
+												</p>
 											</div>
 										</div>
 										<div id="openLoginStatus" class="alert alert-danger hidden"></div>
@@ -1077,7 +1082,10 @@
 						<div class="hidden verifyData" id="verifyPubKey">
 							<h4>Public key</h4>
 							<p><span style="float:right"><a href="" target="_blank" class="verifyLink" title="Link to this page"><span class="glyphicon glyphicon-link"></span></a></span>The above public key has been encoded to its address</p>
-							<p><b>Address</b>: <input type="text" class="form-control address" readonly></p>
+							<p><b>Address</b>:<span class="text-muted">(Legacy)</span>: <input type="text" class="form-control address" readonly></p>
+							<br>
+							<p><b>Segwit Address</b>: <input type="text" class="form-control addressSegWit" readonly></p>
+							<p><b>Segwit Redeem Script</b>: <input type="text" class="form-control addressSegWitRedeemScript" readonly></p>
 						</div>
 
 						<div class="hidden verifyData" id="verifyHDaddress">
diff --git a/js/coin.js b/js/coin.js
index 84362e5..0b7cd7b 100644
--- a/js/coin.js
+++ b/js/coin.js
@@ -882,7 +882,7 @@
 		}
 
 		/* add unspent to transaction */
-		r.addUnspent = function(address, callback, script, segwit){
+		r.addUnspent = function(address, callback, script, segwit, sequence){
 			var self = this;
 			this.listUnspent(address, function(data){
 				var s = coinjs.script();
@@ -919,7 +919,8 @@
 						scr = Crypto.util.bytesToHex(s.buffer);
 					}
 
-					self.addinput(txhash, n, scr);
+					var seq = sequence || false;
+					self.addinput(txhash, n, scr, seq);
 					value += u.getElementsByTagName("value")[0].childNodes[0].nodeValue*1;
 					total++;
 				}
diff --git a/js/coinbin.js b/js/coinbin.js
index df60b70..f91ab6f 100644
--- a/js/coinbin.js
+++ b/js/coinbin.js
@@ -146,6 +146,11 @@ $(document).ready(function() {
 			script = sw.redeemscript;
 		}
 
+		var sequence = false;
+		if($("#walletRBF").is(":checked")){
+			sequence = 0xffffffff-2;
+		}
+
 		tx.addUnspent($("#walletAddress").html(), function(data){
 
 			var dvalue = (data.value/100000000).toFixed(8) * 1;
@@ -186,7 +191,7 @@ $(document).ready(function() {
 
 			$("#walletLoader").addClass("hidden");
 
-		}, script, script);
+		}, script, script, sequence);
 	});
 
 	$("#walletSendBtn").click(function(){
@@ -1471,6 +1476,9 @@ $(document).ready(function() {
 		if(pubkey.length==66 || pubkey.length==130){
 			try {
 				$("#verifyPubKey .address").val(coinjs.pubkey2address(pubkey));
+				var sw = coinjs.segwitAddress(pubkey);
+				$("#verifyPubKey .addressSegWit").val(sw.address);
+				$("#verifyPubKey .addressSegWitRedeemScript").val(sw.redeemscript);
 				$("#verifyPubKey").removeClass("hidden");
 				$(".verifyLink").attr('href','?verify='+$("#verifyScript").val());
 				return true;
diff --git a/sha1sum b/sha1sum
index ae4115d..18fe0fa 100644
--- a/sha1sum
+++ b/sha1sum
@@ -1,9 +1,9 @@
----- Version 1.3 2018.01.04 ---
+---- Version 1.3 2018.01.06 ---
 77e4519962e2f6a9fc93342137dbb31c33b76b04  ./js/aes.js
 3a09a8fc0cfe828b57fc798d668234d0490ee1a6  ./js/bootstrap-datetimepicker.min.js
 253711c6d825de55a8360552573be950da180614  ./js/bootstrap.min.js
-c23f25f218ed8a05376c2f7d98d7056ee9738c74  ./js/coinbin.js
-31fbebf65d9cae8f26761cb057c4fb1b97339d08  ./js/coin.js
+de4506d9cfb7b524d1ab86db8833b07f9aac44a6  ./js/coinbin.js
+cb2843fe530d575cc29b83f9761a2920259fc8a7  ./js/coin.js
 988565bc2cb402d63ed5c5fd7ff47c4278efc2c5  ./js/collapse.js
 9ba5ede3d7f9d4c8fd623395f196adfdcf7e970f  ./js/crypto-min.js
 f7c09f2f5a721371e7d478050119f7e2d58e3ef9  ./js/crypto-sha256-hmac.js
@@ -31,5 +31,4 @@ de51a8494180a6db074af2dee2383f0a363c5b08  ./fonts/glyphicons-halflings-regular.s
 278e49a86e634da6f2a02f3b47dd9d2a8f26210f  ./fonts/glyphicons-halflings-regular.woff
 44bc1850f570972267b169ae18f1cb06b611ffa2  ./fonts/glyphicons-halflings-regular.ttf
 d8a324a13501cd5705dc26b945fc8088f00907ae  ./README.md
-4cd31f66eafbf86e98def4db6ff1b13ba5dcf01a  ./index.html
-
+a75a6c24108b8ad126d815e8a83316d17e0f1899  ./index.html