diff --git a/demo-mjml.html b/demo-mjml.html
index 9b42996ae..d6dfa66ae 100644
--- a/demo-mjml.html
+++ b/demo-mjml.html
@@ -145,7 +145,7 @@
 
     <div class="ad-cont">
       <div id="native-carbon"></div>
-      <script async type="text/javascript" src="./js/carbon.js?v3"></script>
+      <script async type="text/javascript" src="./js/carbon.js?v4"></script>
     </div>
 
 
diff --git a/demo-newsletter-editor.html b/demo-newsletter-editor.html
index 9da6697b0..930a80bce 100644
--- a/demo-newsletter-editor.html
+++ b/demo-newsletter-editor.html
@@ -528,7 +528,7 @@
 
     <div class="ad-cont">
       <div id="native-carbon"></div>
-      <script async type="text/javascript" src="./js/carbon.js?v3"></script>
+      <script async type="text/javascript" src="./js/carbon.js?v4"></script>
     </div>
 
 
diff --git a/demo.html b/demo.html
index 3ca44bb52..22d9b364b 100644
--- a/demo.html
+++ b/demo.html
@@ -156,7 +156,7 @@
     <div class="ad-cont">
       <!-- <script async type="text/javascript" src="//cdn.carbonads.com/carbon.js?zoneid=1673&serve=C6AILKT&placement=grapesjscom" id="_carbonads_js"></script> -->
       <div id="native-carbon"></div>
-      <script async type="text/javascript" src="./js/carbon.js?v3"></script>
+      <script async type="text/javascript" src="./js/carbon.js?v4"></script>
     </div>
 
     <div id="gjs" style="height:0px; overflow:hidden">
diff --git a/index.html b/index.html
index e1260ab1c..7d3870e71 100644
--- a/index.html
+++ b/index.html
@@ -100,7 +100,7 @@
       </div>
 
       <div id="native-carbon"></div>
-      <script async type="text/javascript" src="./js/carbon.js?v3"></script>
+      <!-- <script async type="text/javascript" src="./js/carbon.js?v4"></script> -->
 
       <div class="bann-cont-c">
         <div class="bann-cont">
diff --git a/js/carbon.js b/js/carbon.js
index b9547d7d7..d195eddfa 100644
--- a/js/carbon.js
+++ b/js/carbon.js
@@ -30,7 +30,7 @@ var loadScript = function(src, clb) {
 function BSANativeCallback (a) {
   var total = a.ads.length;
   if (!total) {
-    var script = loadScript('//cdn.carbonads.com/carbon.js?serve=CEADC5QL&placement=grapesjscom');
+    var script = loadScript('//cdn.carbonads.com/carbon.js?serve=CEAIVK77&placement=grapesjscom');
     script.setAttribute('id', '_carbonads_js');
     var adCont = document.getElementById('native-carbon');
     adCont && adCont.appendChild(script);