diff --git a/documentation/demos/6000-elements/index.html b/documentation/demos/6000-elements/index.html
index c861076154..210985daee 100644
--- a/documentation/demos/6000-elements/index.html
+++ b/documentation/demos/6000-elements/index.html
@@ -6,7 +6,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
   </head>
diff --git a/documentation/demos/circle-layout/index.html b/documentation/demos/circle-layout/index.html
index 88282c91e3..d385b12626 100644
--- a/documentation/demos/circle-layout/index.html
+++ b/documentation/demos/circle-layout/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/concentric-layout/index.html b/documentation/demos/concentric-layout/index.html
index 0eebddf911..9f6a78ff92 100644
--- a/documentation/demos/concentric-layout/index.html
+++ b/documentation/demos/concentric-layout/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/cose-bilkent-layout-compound/index.html b/documentation/demos/cose-bilkent-layout-compound/index.html
index c083ee372b..e8f6b4a89e 100644
--- a/documentation/demos/cose-bilkent-layout-compound/index.html
+++ b/documentation/demos/cose-bilkent-layout-compound/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/cose-bilkent-layout/index.html b/documentation/demos/cose-bilkent-layout/index.html
index 7fc87adbb4..b1c0074b49 100644
--- a/documentation/demos/cose-bilkent-layout/index.html
+++ b/documentation/demos/cose-bilkent-layout/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/cose-layout/index.html b/documentation/demos/cose-layout/index.html
index b8d6c500a1..ae35788a9b 100644
--- a/documentation/demos/cose-layout/index.html
+++ b/documentation/demos/cose-layout/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/edge-arrows/index.html b/documentation/demos/edge-arrows/index.html
index 62902db75b..dfd6037197 100644
--- a/documentation/demos/edge-arrows/index.html
+++ b/documentation/demos/edge-arrows/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/edge-types/index.html b/documentation/demos/edge-types/index.html
index f5e8e44a78..9c07cae796 100644
--- a/documentation/demos/edge-types/index.html
+++ b/documentation/demos/edge-types/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/genemania-export/index.html b/documentation/demos/genemania-export/index.html
index 78bc25f55c..c0836c2a18 100644
--- a/documentation/demos/genemania-export/index.html
+++ b/documentation/demos/genemania-export/index.html
@@ -7,7 +7,7 @@
 <link href="style.css" rel="stylesheet" />
 
 <!-- For loading external data files -->
-<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+<script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
 <script src="../../js/cytoscape.min.js"></script>
 </head>
diff --git a/documentation/demos/grid-layout/index.html b/documentation/demos/grid-layout/index.html
index 02da8b1f3b..6d24ce9338 100644
--- a/documentation/demos/grid-layout/index.html
+++ b/documentation/demos/grid-layout/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/labels/index.html b/documentation/demos/labels/index.html
index 8bdd5b48de..784ae081c4 100644
--- a/documentation/demos/labels/index.html
+++ b/documentation/demos/labels/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/node-types/index.html b/documentation/demos/node-types/index.html
index f9d3437c7d..af787fe2b7 100644
--- a/documentation/demos/node-types/index.html
+++ b/documentation/demos/node-types/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/performance-tuning/index.html b/documentation/demos/performance-tuning/index.html
index 129be384b1..074eaad3b3 100644
--- a/documentation/demos/performance-tuning/index.html
+++ b/documentation/demos/performance-tuning/index.html
@@ -6,7 +6,7 @@
 <meta charset=utf-8 />
 
 <!-- For loading external data files -->
-<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+<script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
 <script src="../../js/cytoscape.min.js"></script>
 <title>Performance tuning</title>
diff --git a/documentation/demos/radius-types/index.html b/documentation/demos/radius-types/index.html
index 52a200bb76..5feab44f50 100644
--- a/documentation/demos/radius-types/index.html
+++ b/documentation/demos/radius-types/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/demos/spread-layout/index.html b/documentation/demos/spread-layout/index.html
index bac094a9c1..b19882b290 100644
--- a/documentation/demos/spread-layout/index.html
+++ b/documentation/demos/spread-layout/index.html
@@ -7,7 +7,7 @@
     <link href="style.css" rel="stylesheet" />
 
     <!-- For loading external data files -->
-    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=Promise,fetch"></script>
+    <script src="https://cdnjs.cloudflare.com/polyfill/v2/polyfill.min.js?features=Promise,fetch"></script>
 
     <script src="../../js/cytoscape.min.js"></script>
 
diff --git a/documentation/docmaker.json b/documentation/docmaker.json
index 61a5888f5d..0c1b81a79f 100644
--- a/documentation/docmaker.json
+++ b/documentation/docmaker.json
@@ -46,7 +46,7 @@
         { "name": "Circle layout", "id": "circle-layout" },
         { "name": "Concentric layout", "id": "concentric-layout" },
         { "name": "AVSDF layout", "id": "avsdf-layout", "github": "iVis-at-Bilkent/cytoscape.js-avsdf",  "viewUrl": "https://ivis-at-bilkent.github.io/cytoscape.js-avsdf/demo.html" },
-        { "name": "CiSE layout", "id": "cise-layout", "github": "iVis-at-Bilkent/cytoscape.js-cise",  "viewUrl": "https://ivis-at-bilkent.github.io/cytoscape.js-cise/demo.html" },
+        { "name": "CiSE layout", "id": "cise-layout", "github": "iVis-at-Bilkent/cytoscape.js-cise",  "viewUrl": "https://ivis-at-bilkent.github.io/cytoscape.js-cise/demo/demo.html" },
         { "name": "Grid layout", "id": "grid-layout" },
         { "name": "CoSE layout", "id": "cose-layout" },
         { "name": "CoSE Bilkent layout", "id": "cose-bilkent-layout", "github": "cytoscape/cytoscape.js-cose-bilkent" },