diff --git a/jquery.sketchable.memento.js b/jquery.sketchable.memento.js
index 20b94c8..d134460 100644
--- a/jquery.sketchable.memento.js
+++ b/jquery.sketchable.memento.js
@@ -158,7 +158,6 @@
     if (!options.interactive) return opts;
     
     var mc = new MementoCanvas(elem);
-    
     var callbacks = {
       init: function(elem, data) {
         data.memento = mc;
@@ -187,11 +186,15 @@
         plugin.defaults.events[ev] = callbacks[ev];
       }
     };
-    
-    // Event order matters.
-    var events = 'init mouseup destroy'.split(" ");
-    for (var i = 0; i < events.length; i++) {
-      override(events[i]);
+
+    // Avoid re-attaching the same callbacks more than once.
+    if (!plugin.isMementoReady) {
+      // Event order matters.
+      var events = 'init mouseup destroy'.split(" ");
+      for (var i = 0; i < events.length; i++) {
+        override(events[i]);
+      }
+      plugin.isMementoReady = true;
     }
     
     // Expose public API for jquery.sketchable plugin.
diff --git a/jquery.sketchable.memento.min.js b/jquery.sketchable.memento.min.js
index bbf5f4e..fd74865 100644
--- a/jquery.sketchable.memento.min.js
+++ b/jquery.sketchable.memento.min.js
@@ -1,4 +1,4 @@
 /*!
  * Memento plugin for jQuery sketchable | v1.1 | Luis A. Leiva | MIT license
  */
-;(function(e){var a=function(m){var h=[];var g=-1;var i=this;function l(){if(g>0){g--;var o=new Image();o.src=h[g].image;o.onload=function(){j(this)}}}function k(){if(g<h.length-1){g++;var o=new Image();o.src=h[g].image;o.onload=function(){j(this)}}}function j(o){m.sketchable("handler",function(p,q){q.sketch.clear();q.sketch.graphics.drawImage(o,0,0)})}function n(o){if(o.ctrlKey){switch(o.which){case 26:if(o.shiftKey){i.redo()}else{i.undo()}break;case 25:i.redo();break;default:break}}}this.undo=function(){l();m.sketchable("handler",function(o,p){p.strokes=h[g].strokes.slice()})};this.redo=function(){k();m.sketchable("handler",function(o,p){p.strokes=h[g].strokes.slice()})};this.reset=function(){h=[];g=-1};this.save=function(){g++;if(g<h.length){h.length=g}m.sketchable("handler",function(o,p){h.push({image:o[0].toDataURL(),strokes:p.strokes.slice()})})};this.init=function(){e(document).off("keypress",n);e(document).on("keypress",n)};this.destroy=function(){e(document).off("keypress",n);this.reset()}};var d=e.fn.sketchable;var f=d("methods");function c(j,g){var o=j,p=e.extend(true,d.defaults,g);if(!p.interactive){return g}var m=new a(j);var l={init:function(i,q){q.memento=m;q.memento.save();q.memento.init()},mouseup:function(i,q,r){q.memento.save()},destroy:function(i,q){q.memento.destroy()}};function h(q){if(p&&p.events&&typeof p.events[q]==="function"){var i=p.events[q];p.events[q]=function(){var r=Array.prototype.slice.call(arguments,0);i.apply(o,r);l[q].apply(o,r)}}else{d.defaults.events[q]=l[q]}}var n="init mouseup destroy".split(" ");for(var k=0;k<n.length;k++){h(n[k])}e.extend(f,{undo:function(){m.undo()},redo:function(){m.redo()}});return d.defaults}var b=f.init;f.init=function(h){var g=c(this,h);return b.call(this,g)}})(jQuery);
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+(function(e){var a=function(m){var h=[];var g=-1;var i=this;function l(){if(g>0){g--;var o=new Image();o.src=h[g].image;o.onload=function(){j(this)}}}function k(){if(g<h.length-1){g++;var o=new Image();o.src=h[g].image;o.onload=function(){j(this)}}}function j(o){m.sketchable("handler",function(p,q){q.sketch.clear();q.sketch.graphics.drawImage(o,0,0)})}function n(o){if(o.ctrlKey){switch(o.which){case 26:if(o.shiftKey){i.redo()}else{i.undo()}break;case 25:i.redo();break;default:break}}}this.undo=function(){l();m.sketchable("handler",function(o,p){p.strokes=h[g].strokes.slice()})};this.redo=function(){k();m.sketchable("handler",function(o,p){p.strokes=h[g].strokes.slice()})};this.reset=function(){h=[];g=-1};this.save=function(){g++;if(g<h.length){h.length=g}m.sketchable("handler",function(o,p){h.push({image:o[0].toDataURL(),strokes:p.strokes.slice()})})};this.init=function(){e(document).off("keypress",n);e(document).on("keypress",n)};this.destroy=function(){e(document).off("keypress",n);this.reset()}};var d=e.fn.sketchable;var f=d("methods");function c(j,g){var o=j,p=e.extend(true,d.defaults,g);if(!p.interactive){return g}var m=new a(j);var l={init:function(i,q){q.memento=m;q.memento.save();q.memento.init()},mouseup:function(i,q,r){q.memento.save()},destroy:function(i,q){q.memento.destroy()}};function h(q){if(p&&p.events&&typeof p.events[q]==="function"){var i=p.events[q];p.events[q]=function(){var r=Array.prototype.slice.call(arguments,0);i.apply(o,r);l[q].apply(o,r)}}else{d.defaults.events[q]=l[q]}}if(!d.isMementoReady){var n="init mouseup destroy".split(" ");for(var k=0;k<n.length;k++){h(n[k])}d.isMementoReady=true}e.extend(f,{undo:function(){m.undo()},redo:function(){m.redo()}});return d.defaults}var b=f.init;f.init=function(h){var g=c(this,h);return b.call(this,g)}})(jQuery);
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