diff --git a/README.md b/README.md
index b9125b2..3dd54e4 100644
--- a/README.md
+++ b/README.md
@@ -8,9 +8,13 @@ Printer emulator for zpl rendering engine. The emulator is based on the [labelar
 
 ## Release notes
 
+### Version 1.6
+* **Fix** PDF label export.
+* **New** TCP input buffer size can be configure in settings.
+
 ### Version 1.5
 
-* **New** Support to print multtiple labels in one request.
+* **New** Support to print multiple labels in one request.
 * **New** Optional setting to keep tcp connection alive.
 
 ### Version 1.4.1
diff --git a/ZplPrinter.zip b/ZplPrinter.zip
index fd12801..39fb408 100644
Binary files a/ZplPrinter.zip and b/ZplPrinter.zip differ
diff --git a/ZplPrinter/js/background.js b/ZplPrinter/js/background.js
index 0caabc6..b8583e6 100644
--- a/ZplPrinter/js/background.js
+++ b/ZplPrinter/js/background.js
@@ -19,6 +19,7 @@ chrome.runtime.onInstalled.addListener(function (details) {
             unit: '1',
             host: '127.0.0.1',
             port: '9100',
+            bufferSize: '4096',
             keepTcpSocket: false,
             saveLabels: false,
             filetype: '1',
diff --git a/ZplPrinter/js/main.js b/ZplPrinter/js/main.js
index a62252a..b2664a4 100644
--- a/ZplPrinter/js/main.js
+++ b/ZplPrinter/js/main.js
@@ -28,9 +28,16 @@ $(document).ready(function () {
 
         for (var i in zpls) {
             var zpl = zpls[i];
-            if (zpl != "") {
-                zpl = zpl + "^XZ";
+            if(!(!zpl || !zpl.length)) {
+                zpl += "^XZ";
             }
+
+            if (configs['saveLabels']) {
+                if (configs['filetype'] == '2') {
+                    savePdf(zpl, configs.density, width, height);
+                }
+            }
+
             var xhr = new XMLHttpRequest();
             xhr.open('POST', 'http://api.labelary.com/v1/printers/{0}dpmm/labels/{1}x{2}/0/'.format(configs.density, width, height), true);
             xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
@@ -41,8 +48,6 @@ $(document).ready(function () {
                     if (configs['saveLabels']) {
                         if (configs['filetype'] == '1') {
                             saveLabel(blob, 'png');
-                        } else {
-                            savePdf(zpl, configs.density, width, height);
                         }
                     }
                     var size = getSize(width, height)
@@ -150,7 +155,9 @@ function startTcpServer() {
                 chrome.sockets.tcpServer.onAccept.addListener(function (clientInfo) {
                     chrome.sockets.tcp.getInfo(clientInfo.clientSocketId, function (socketInfo) {
                         clientSocketInfo = socketInfo;
-                        chrome.sockets.tcp.setPaused(clientInfo.clientSocketId, false);
+                        chrome.sockets.tcp.update(clientInfo.clientSocketId,{bufferSize: parseInt(configs.bufferSize) }, function(){
+                            chrome.sockets.tcp.setPaused(clientInfo.clientSocketId, false);
+                        });
                     });
                 });
             } else {
diff --git a/ZplPrinter/main.html b/ZplPrinter/main.html
index 9023b90..1bd88d6 100644
--- a/ZplPrinter/main.html
+++ b/ZplPrinter/main.html
@@ -131,8 +131,15 @@
                                 </table>
                                 <br/>
                                 <table>
-                                    <tr>
+                                    <tr>     
                                         <td>
+                                            <div class="input-group" style="padding-right: 10px;">
+                                                <span class="input-group-addon">Buffer</span>
+                                                <input id="bufferSize" name="bufferSize" class="form-control" placeholder="4096" required type="number" min="1024">
+                                                <span class="input-group-addon">B</span>
+                                            </div>
+                                        </td>
+                                        <td width="50%">
                                             <div class="checkbox" style="padding-right: 10px;">
                                                 <label>
                                                         <input id="ckb-keep-tcp-socket" type="checkbox" />