diff --git a/app/common/directives/serial-console.js b/app/common/directives/serial-console.js
index 6e0137a..59ffe78 100644
--- a/app/common/directives/serial-console.js
+++ b/app/common/directives/serial-console.js
@@ -35,14 +35,89 @@
   return rect;
 }
 
-/*
-TextEncoder/TextDecoder does not support IE.
-Use text-encoding instead in IE
-More detail at https://caniuse.com/#feat=textencoder
-*/
-import {TextDecoder} from 'text-encoding';
-if (!window['TextDecoder']) {
-  window['TextDecoder'] = TextDecoder;
+// Add a TextEncoder polyfill to handle ie9 properly.  (does anyone still use
+// that anymore? Grabbed from
+// https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder#Polyfill
+if (typeof TextEncoder === 'undefined') {
+  TextEncoder = function TextEncoder() {};
+  TextEncoder.prototype.encode = function encode(str) {
+    'use strict';
+    var Len = str.length, resPos = -1;
+    // The Uint8Array's length must be at least 3x the length of the string
+    // because an invalid UTF-16
+    //  takes up the equivelent space of 3 UTF-8 characters to encode it
+    //  properly. However, Array's have an auto expanding length and 1.5x should
+    //  be just the right balance for most uses.
+    var resArr = typeof Uint8Array === 'undefined' ? new Array(Len * 1.5) :
+                                                     new Uint8Array(Len * 3);
+    for (var point = 0, nextcode = 0, i = 0; i !== Len;) {
+      point = str.charCodeAt(i), i += 1;
+      if (point >= 0xD800 && point <= 0xDBFF) {
+        if (i === Len) {
+          resArr[resPos += 1] = 0xef /*0b11101111*/;
+          resArr[resPos += 1] = 0xbf /*0b10111111*/;
+          resArr[resPos += 1] = 0xbd /*0b10111101*/;
+          break;
+        }
+        // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+        nextcode = str.charCodeAt(i);
+        if (nextcode >= 0xDC00 && nextcode <= 0xDFFF) {
+          point = (point - 0xD800) * 0x400 + nextcode - 0xDC00 + 0x10000;
+          i += 1;
+          if (point > 0xffff) {
+            resArr[resPos += 1] = (0x1e /*0b11110*/ << 3) | (point >>> 18);
+            resArr[resPos += 1] =
+                (0x2 /*0b10*/ << 6) | ((point >>> 12) & 0x3f /*0b00111111*/);
+            resArr[resPos += 1] =
+                (0x2 /*0b10*/ << 6) | ((point >>> 6) & 0x3f /*0b00111111*/);
+            resArr[resPos += 1] =
+                (0x2 /*0b10*/ << 6) | (point & 0x3f /*0b00111111*/);
+            continue;
+          }
+        } else {
+          resArr[resPos += 1] = 0xef /*0b11101111*/;
+          resArr[resPos += 1] = 0xbf /*0b10111111*/;
+          resArr[resPos += 1] = 0xbd /*0b10111101*/;
+          continue;
+        }
+      }
+      if (point <= 0x007f) {
+        resArr[resPos += 1] = (0x0 /*0b0*/ << 7) | point;
+      } else if (point <= 0x07ff) {
+        resArr[resPos += 1] = (0x6 /*0b110*/ << 5) | (point >>> 6);
+        resArr[resPos += 1] =
+            (0x2 /*0b10*/ << 6) | (point & 0x3f /*0b00111111*/);
+      } else {
+        resArr[resPos += 1] = (0xe /*0b1110*/ << 4) | (point >>> 12);
+        resArr[resPos += 1] =
+            (0x2 /*0b10*/ << 6) | ((point >>> 6) & 0x3f /*0b00111111*/);
+        resArr[resPos += 1] =
+            (0x2 /*0b10*/ << 6) | (point & 0x3f /*0b00111111*/);
+      }
+    }
+    if (typeof Uint8Array !== 'undefined')
+      return resArr.subarray(0, resPos + 1);
+    // else // IE 6-9
+    resArr.length = resPos + 1;  // trim off extra weight
+    return resArr;
+  };
+  TextEncoder.prototype.toString = function() {
+    return '[object TextEncoder]'
+  };
+  try {  // Object.defineProperty only works on DOM prototypes in IE8
+    Object.defineProperty(TextEncoder.prototype, 'encoding', {
+      get: function() {
+        if (TextEncoder.prototype.isPrototypeOf(this))
+          return 'utf-8';
+        else
+          throw TypeError('Illegal invocation');
+      }
+    });
+  } catch (e) { /*IE6-8 fallback*/
+    TextEncoder.prototype.encoding = 'utf-8';
+  }
+  if (typeof Symbol !== 'undefined')
+    TextEncoder.prototype[Symbol.toStringTag] = 'TextEncoder';
 }
 
 window.angular && (function(angular) {