diff --git a/Gruntfile.js b/Gruntfile.js
index 1c422cf8c5..17adc177bd 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -514,8 +514,17 @@ module.exports = function(grunt) {
 				},
 				src: SOURCE_DIR + 'wp-admin/js/bookmarklet.js',
 				dest: SOURCE_DIR + 'wp-admin/js/bookmarklet.min.js'
+			},
+			masonry: {
+				options: {
+					// Preserve comments that start with a bang.
+					preserveComments: /^!/
+				},
+				src: SOURCE_DIR + 'wp-includes/js/jquery/jquery.masonry.js',
+				dest: SOURCE_DIR + 'wp-includes/js/jquery/jquery.masonry.min.js',
 			}
 		},
+
 		concat: {
 			tinymce: {
 				options: {
@@ -676,6 +685,7 @@ module.exports = function(grunt) {
 		'browserify',
 		'jshint:corejs',
 		'uglify:bookmarklet',
+		'uglify:masonry',
 		'qunit:compiled'
 	] );
 
diff --git a/src/wp-includes/js/jquery/jquery.masonry.min.js b/src/wp-includes/js/jquery/jquery.masonry.min.js
index 79b536e1b2..737b0e3107 100644
--- a/src/wp-includes/js/jquery/jquery.masonry.min.js
+++ b/src/wp-includes/js/jquery/jquery.masonry.min.js
@@ -1,11 +1,11 @@
--/*!
-- * Masonry v2 shim
-- * to maintain backwards compatibility
-- * as of Masonry v3.1.2
-- *
-- * Cascading grid layout library
-- * http://masonry.desandro.com
-- * MIT License
-- * by David DeSandro
-- */
-!function(a){"use strict";var b=a.Masonry;b.prototype._remapV2Options=function(){this._remapOption("gutterWidth","gutter"),this._remapOption("isResizable","isResizeBound"),this._remapOption("isRTL","isOriginLeft",function(a){return!a});var a=this.options.isAnimated;if(void 0!==a&&(this.options.transitionDuration=a?b.prototype.options.transitionDuration:0),void 0===a||a){var c=this.options.animationOptions,d=c&&c.duration;d&&(this.options.transitionDuration="string"==typeof d?d:d+"ms")}},b.prototype._remapOption=function(a,b,c){var d=this.options[a];void 0!==d&&(this.options[b]=c?c(d):d)};var c=b.prototype._create;b.prototype._create=function(){var a=this;this._remapV2Options(),c.apply(this,arguments),setTimeout(function(){jQuery(a.element).addClass("masonry")},0)};var d=b.prototype.layout;b.prototype.layout=function(){this._remapV2Options(),d.apply(this,arguments)};var e=b.prototype.option;b.prototype.option=function(){e.apply(this,arguments),this._remapV2Options()};var f=b.prototype._itemize;b.prototype._itemize=function(a){var b=f.apply(this,arguments);return jQuery(a).addClass("masonry-brick"),b};var g=b.prototype.measureColumns;b.prototype.measureColumns=function(){var a=this.options.columnWidth;a&&"function"==typeof a&&(this.getContainerWidth(),this.columnWidth=a(this.containerWidth)),g.apply(this,arguments)},b.prototype.reload=function(){this.reloadItems.apply(this,arguments),this.layout.apply(this)};var h=b.prototype.destroy;b.prototype.destroy=function(){var a=this.getItemElements();jQuery(this.element).removeClass("masonry"),jQuery(a).removeClass("masonry-brick"),h.apply(this,arguments)}}(window);
\ No newline at end of file
+/*!
+ * Masonry v2 shim
+ * to maintain backwards compatibility
+ * as of Masonry v3.1.2
+ *
+ * Cascading grid layout library
+ * http://masonry.desandro.com
+ * MIT License
+ * by David DeSandro
+ */
+!function(a){"use strict";var b=a.Masonry;b.prototype._remapV2Options=function(){this._remapOption("gutterWidth","gutter"),this._remapOption("isResizable","isResizeBound"),this._remapOption("isRTL","isOriginLeft",function(a){return!a});var a=this.options.isAnimated;if(void 0!==a&&(this.options.transitionDuration=a?this.options.transitionDuration:0),void 0===a||a){var b=this.options.animationOptions,c=b&&b.duration;c&&(this.options.transitionDuration="string"==typeof c?c:c+"ms")}},b.prototype._remapOption=function(a,b,c){var d=this.options[a];void 0!==d&&(this.options[b]=c?c(d):d)};var c=b.prototype._create;b.prototype._create=function(){var a=this;this._remapV2Options(),c.apply(this,arguments),setTimeout(function(){jQuery(a.element).addClass("masonry")},0)};var d=b.prototype.layout;b.prototype.layout=function(){this._remapV2Options(),d.apply(this,arguments)};var e=b.prototype.option;b.prototype.option=function(){e.apply(this,arguments),this._remapV2Options()};var f=b.prototype._itemize;b.prototype._itemize=function(a){var b=f.apply(this,arguments);return jQuery(a).addClass("masonry-brick"),b};var g=b.prototype.measureColumns;b.prototype.measureColumns=function(){var a=this.options.columnWidth;a&&"function"==typeof a&&(this.getContainerWidth(),this.columnWidth=a(this.containerWidth)),g.apply(this,arguments)},b.prototype.reload=function(){this.reloadItems.apply(this,arguments),this.layout.apply(this)};var h=b.prototype.destroy;b.prototype.destroy=function(){var a=this.getItemElements();jQuery(this.element).removeClass("masonry"),jQuery(a).removeClass("masonry-brick"),h.apply(this,arguments)}}(window);
\ No newline at end of file
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index b4790d4d20..22f8f2b8b2 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -250,7 +250,7 @@ function wp_default_scripts( &$scripts ) {
 	// It sets jQuery as a dependency, as the theme may have been implicitly loading it this way.
 	$scripts->add( 'imagesloaded', "/wp-includes/js/imagesloaded.min.js", array(), '3.2.0', 1 );
 	$scripts->add( 'masonry', "/wp-includes/js/masonry.min.js", array( 'imagesloaded' ), '3.3.2', 1 );
-	$scripts->add( 'jquery-masonry', "/wp-includes/js/jquery/jquery.masonry$dev_suffix.js", array( 'jquery', 'masonry' ), '3.1.2a', 1 );
+	$scripts->add( 'jquery-masonry', "/wp-includes/js/jquery/jquery.masonry$dev_suffix.js", array( 'jquery', 'masonry' ), '3.1.2b', 1 );
 
 	$scripts->add( 'thickbox', "/wp-includes/js/thickbox/thickbox.js", array('jquery'), '3.1-20121105', 1 );
 	did_action( 'init' ) && $scripts->localize( 'thickbox', 'thickboxL10n', array(