diff --git a/Gruntfile.js b/Gruntfile.js
index dc851b7..5782b55 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -181,9 +181,22 @@ grunt.initConfig({
 
     // -- Grid Units Config ----------------------------------------------------
 
-    grid_units: {
-        dest : 'build/grids-units.css',
-        units: [5, 24]
+    pure_grids: {
+        main: {
+            dest : 'build/grids-units.css',
+            units: [5, 24]
+        },
+        responsive: {
+            dest: 'build/grids-responsive.css',
+            options: {
+                mediaQueries: {
+                    sm : 'screen and (min-width: 35.5em)',  // 568px
+                    md: 'screen and (min-width: 48em)',    // 768px
+                    lg: 'screen and (min-width: 64em)',   // 1024px
+                    xl : 'screen and (min-width: 75em)'  // 1200px
+                }
+            }
+        }
     },
 
     // -- CSS Selectors Config -------------------------------------------------
@@ -224,6 +237,8 @@ grunt.loadNpmTasks('grunt-contrib-cssmin');
 grunt.loadNpmTasks('grunt-contrib-compress');
 grunt.loadNpmTasks('grunt-contrib-watch');
 grunt.loadNpmTasks('grunt-css-selectors');
+grunt.loadNpmTasks('grunt-pure-grids');
+
 
 // Local tasks.
 grunt.loadTasks('tasks/');
@@ -234,7 +249,7 @@ grunt.registerTask('test', ['csslint']);
 grunt.registerTask('build', [
     'clean:build',
     'copy:build',
-    'grid_units',
+    'pure_grids',
     'concat:build',
     'clean:build_res',
     'css_selectors:base',
diff --git a/tasks/grid_units.js b/tasks/grid_units.js
deleted file mode 100644
index 0b8d45c..0000000
--- a/tasks/grid_units.js
+++ /dev/null
@@ -1,14 +0,0 @@
-'use strict';
-
-var rework    = require('rework'),
-    pureGrids = require('rework-pure-grids');
-
-module.exports = function (grunt) {
-    grunt.registerTask('grid_units', 'Generates grid units.', function (target) {
-        var config = grunt.config.get(this.name),
-            css    = rework('').use(pureGrids.units(config.units));
-
-        grunt.file.write(config.dest, css.toString({indent: '    '}));
-        grunt.log.writeln('File "' + config.dest + '" created.');
-    });
-};