thingsboard-aplcache

diff --git a/ui/package.json b/ui/package.json
index 284f904..4959237 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -128,7 +128,8 @@
     "webpack-dev-server": "^1.15.1",
     "webpack-hot-middleware": "^2.12.2",
     "webpack-material-design-icons": "^0.1.0",
-    "directory-tree": "^2.1.0"
+    "directory-tree": "^2.1.0",
+    "jsonminify": "^0.4.1"
   },
   "engine": "node >= 5.9.0",
   "nyc": {

diff --git a/ui/webpack.config.dev.js b/ui/webpack.config.dev.js
index 1aa09ff..7d2b0d3 100644
--- a/ui/webpack.config.dev.js
+++ b/ui/webpack.config.dev.js
@@ -21,6 +21,7 @@ const CopyWebpackPlugin = require('copy-webpack-plugin');
 const webpack = require('webpack');
 const path = require('path');
 const dirTree = require('directory-tree');
+const jsonminify = require("jsonminify");
 
 const PUBLIC_RESOURCE_PATH = '/';
 
@@ -55,8 +56,18 @@ module.exports = {
             moment: "moment"
         }),
         new CopyWebpackPlugin([
-            { from: './src/thingsboard.ico', to: 'thingsboard.ico' },
-            { from: './src/app/locale', to: 'locale' }
+            {
+                from: './src/thingsboard.ico',
+                to: 'thingsboard.ico'
+            },
+            {
+                from: './src/app/locale',
+                to: 'locale',
+                ignore: [ '*.js' ],
+                transform: function(content, path) {
+                    return Buffer.from(jsonminify(content.toString()));
+                }
+            }
         ]),
         new webpack.HotModuleReplacementPlugin(),
         new HtmlWebpackPlugin({

diff --git a/ui/webpack.config.prod.js b/ui/webpack.config.prod.js
index bae09c2..a442590 100644
--- a/ui/webpack.config.prod.js
+++ b/ui/webpack.config.prod.js
@@ -22,6 +22,7 @@ const CompressionPlugin = require('compression-webpack-plugin');
 const webpack = require('webpack');
 const path = require('path');
 const dirTree = require('directory-tree');
+const jsonminify = require("jsonminify");
 
 const PUBLIC_RESOURCE_PATH = '/static/';
 
@@ -53,8 +54,18 @@ module.exports = {
             moment: "moment"
         }),
         new CopyWebpackPlugin([
-            { from: './src/thingsboard.ico', to: 'thingsboard.ico'},
-            { from: './src/app/locale', to: 'locale' }
+            {
+                from: './src/thingsboard.ico',
+                to: 'thingsboard.ico'
+            },
+            {
+                from: './src/app/locale',
+                to: 'locale',
+                ignore: [ '*.js' ],
+                transform: function(content, path) {
+                    return Buffer.from(jsonminify(content.toString()));
+                }
+            }
         ]),
         new HtmlWebpackPlugin({
             template: './src/index.html',