diff --git a/views/ngXosLib/gulp/ngXosHelpers.js b/views/ngXosLib/gulp/ngXosHelpers.js
index f833fb8..7424218 100644
--- a/views/ngXosLib/gulp/ngXosHelpers.js
+++ b/views/ngXosLib/gulp/ngXosHelpers.js
@@ -5,10 +5,33 @@
 var angularFilesort = require('gulp-angular-filesort');
 var gulpDocs = require('gulp-ngdocs');
 var del = require('del');
+var babel = require('gulp-babel');
+const sourcemaps = require('gulp-sourcemaps');
 
 module.exports = function(options){
-  gulp.task('helpers', function(){
-    return gulp.src([options.xosHelperSource + '**/*.js'])
+
+  // transpile js with sourceMaps
+  gulp.task('babel', function(){
+    return gulp.src(options.xosHelperSource + '**/*.js')
+      .pipe(babel({
+        presets: ['es2015']
+      }))
+      .pipe(gulp.dest(options.xosHelperTmp));
+  });
+
+  gulp.task('babelDev', function(){
+    return gulp.src(options.xosHelperSource + '**/*.js')
+      .pipe(sourcemaps.init())
+      .pipe(babel({
+        presets: ['es2015']
+      }))
+      .pipe(sourcemaps.write('./maps'))
+      .pipe(gulp.dest(options.xosHelperTmp));
+  });
+
+  // build
+  gulp.task('helpers', ['babel'], function(){
+    return gulp.src([options.xosHelperTmp + '**/*.js'])
       .pipe(angularFilesort())
       .pipe(concat('ngXosHelpers.js'))
       .pipe(ngAnnotate())
@@ -16,6 +39,15 @@
       .pipe(gulp.dest(options.ngXosVendor));
   });
 
+  // build Dev (no minify, sourcemaps)
+  gulp.task('helpersDev', ['babelDev'], function(){
+    return gulp.src([options.xosHelperTmp + '**/*.js'])
+      .pipe(angularFilesort())
+      .pipe(concat('ngXosHelpers.js'))
+      .pipe(ngAnnotate())
+      .pipe(gulp.dest(options.ngXosVendor));
+  });
+
   gulp.task('cleanDocs', function(){
     console.log(options);
     return del([options.docs + '**/*']);
@@ -49,4 +81,8 @@
       }
     }).pipe(gulpDocs.process(ngOptions)).pipe(gulp.dest('./docs'));
   });
+
+  gulp.task('dev', function(){
+    gulp.watch(options.xosHelperSource + '**/*.js', ['helpersDev']);
+  });
 };
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