diff --git a/io/serialport/25-serial.html b/io/serialport/25-serial.html
index 1ecc910c..0021e99b 100644
--- a/io/serialport/25-serial.html
+++ b/io/serialport/25-serial.html
@@ -1,5 +1,5 @@
 
-<script type="text/x-red" data-template-name="serial in">
+<script type="text/html" data-template-name="serial in">
     <div class="form-row node-input-serial">
         <label for="node-input-serial"><i class="fa fa-random"></i> <span data-i18n="serial.label.serialport"></span></label>
         <input type="text" id="node-input-serial">
@@ -10,7 +10,7 @@
     </div>
 </script>
 
-<script type="text/x-red" data-help-name="serial in">
+<script type="text/html" data-help-name="serial in">
     <p>Reads data from a local serial port.</p>
     <p>Can either <ul><li>wait for a "split" character (default \n). Also accepts hex notation (0x0d).</li>
     <li>Wait for a timeout in milliseconds from the first character received</li>
@@ -43,7 +43,7 @@
     });
 </script>
 
-<script type="text/x-red" data-template-name="serial out">
+<script type="text/html" data-template-name="serial out">
     <div class="form-row node-input-serial">
         <label for="node-input-serial"><i class="fa fa-random"></i> <span data-i18n="serial.label.serialport"></span></label>
         <input type="text" id="node-input-serial">
@@ -54,7 +54,7 @@
     </div>
 </script>
 
-<script type="text/x-red" data-help-name="serial out">
+<script type="text/html" data-help-name="serial out">
     <p>Provides a connection to an outbound serial port.</p>
     <p>Only the <code>msg.payload</code> is sent.</p>
     <p>Optionally the new line character used to split the input can be appended to every message sent out to the serial port.</p>
@@ -83,7 +83,7 @@
     });
 </script>
 
-<script type="text/x-red" data-template-name="serial request">
+<script type="text/html" data-template-name="serial request">
     <div class="form-row node-input-serial">
         <label for="node-input-serial"><i class="fa fa-random"></i> <span data-i18n="serial.label.serialport"></span></label>
         <input type="text" id="node-input-serial">
@@ -94,7 +94,7 @@
     </div>
 </script>
 
-<script type="text/x-red" data-help-name="serial request">
+<script type="text/html" data-help-name="serial request">
     <p>Provides a connection to a request/response serial port.</p>
     <p>This node behaves as a tightly coupled combination of <code>serial in</code> and <code>serial out</code> nodes,
     with which it shares the configuration.</p>
@@ -143,7 +143,7 @@
     });
 </script>
 
-<script type="text/x-red" data-template-name="serial-port">
+<script type="text/html" data-template-name="serial-port">
     <div class="form-row">
         <label for="node-config-input-serialport"><i class="fa fa-random"></i> <span data-i18n="serial.label.serialport"></span></label>
         <input type="text" id="node-config-input-serialport" style="width:66%;" data-i18n="[placeholder]serial.placeholder.serialport">
@@ -235,7 +235,7 @@
     <div class="form-tips" id="tip-count" hidden><span data-i18n="serial.tip.count"></span></div>
 </script>
 
-<script type="text/x-red" data-help-name="serial-port">
+<script type="text/html" data-help-name="serial-port">
     <p>Provides configuration options for a serial port.</p>
     <p>The search button should return a list of available serial ports to choose from, or you
     can type in the location if known.</p>
@@ -258,7 +258,7 @@
             newline: {value:"\\n"},
             bin: {value:"false"},
             out: {value:"char"},
-            addchar: {value:false},
+            addchar: {value:""},
             responsetimeout: {value: 10000}
         },
         label: function() {
diff --git a/io/serialport/package.json b/io/serialport/package.json
index c365d785..33070f29 100644
--- a/io/serialport/package.json
+++ b/io/serialport/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-serialport",
-    "version"       : "0.9.1",
+    "version"       : "0.9.2",
     "description"   : "Node-RED nodes to talk to serial ports",
     "dependencies"  : {
         "serialport"   : "^8.0.5"
@@ -17,7 +17,7 @@
             "serialport": "25-serial.js"
         }
     },
-    "engines" : { "node" : ">=8" },
+    "engines" : { "node" : ">=8.6.0" },
     "author": {
         "name": "Dave Conway-Jones",
         "email": "ceejay@vnet.ibm.com",