diff --git a/Gruntfile.js b/Gruntfile.js
index e9b938c00..0183f688e 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -83,6 +83,7 @@ module.exports = function(grunt) {
           'js/shell.js', // shell must be loaded before moment due to the way moment loads in a commonjs env
           'lib/moment/min/moment.min.js',
           'lib/qrcode-generator/js/qrcode.js',
+          'lib/underscore/underscore.js',
           'lib/bitcore.js',
           'lib/crypto-js/rollups/sha256.js',
           'lib/crypto-js/rollups/pbkdf2.js',
diff --git a/bower.json b/bower.json
index d58a6e511..331b065ca 100644
--- a/bower.json
+++ b/bower.json
@@ -21,7 +21,8 @@
     "socket.io-client": ">=1.0.0",
     "mousetrap": "1.4.6",
     "zeroclipboard": "~1.3.5",
-    "ng-idle": "*"
+    "ng-idle": "*",
+    "underscore": "~1.7.0"
   },
   "resolutions": {
     "angular": "=1.2.19"
diff --git a/karma.conf.js b/karma.conf.js
index 74d8f7377..bc467f9bb 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -29,6 +29,7 @@ module.exports = function(config) {
       'lib/angular-foundation/mm-foundation.min.js',
       'lib/angular-foundation/mm-foundation-tpls.min.js',
       'lib/bitcore.js',
+      'lib/underscore/underscore.js',
       'lib/crypto-js/rollups/sha256.js',
       'lib/crypto-js/rollups/pbkdf2.js',
       'lib/crypto-js/rollups/aes.js',
diff --git a/package.json b/package.json
index 258a25603..c970b0737 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,8 @@
     "optimist": "^0.6.1",
     "preconditions": "^1.0.7",
     "request": "^2.40.0",
-    "sinon": "1.9.1"
+    "sinon": "1.9.1",
+    "underscore": "^1.7.0"
   },
   "scripts": {
     "shell": "node shell/scripts/launch.js",
@@ -72,7 +73,7 @@
     "travis-cov": "0.2.5",
     "uglifyify": "1.2.3",
     "crypto-js": "3.1.2",
-    "shelljs":"0.3.0",
+    "shelljs": "0.3.0",
     "browser-request": "0.3.2",
     "request": "2.40.0"
   },
diff --git a/util/build.js b/util/build.js
index bcd6f5ec1..c3b8b7bd6 100644
--- a/util/build.js
+++ b/util/build.js
@@ -43,6 +43,9 @@ var createBundle = function(opts) {
   b.require('browser-request', {
     expose: 'request'
   });
+  b.require('underscore', {
+    expose: 'underscore'
+  });
 
   b.require('./copay', {
     expose: 'copay'