diff --git a/README.md b/README.md
index 5d37b42eb..942592d4f 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Cropper.js
 
-[![Build Status](https://img.shields.io/travis/fengyuanchen/cropperjs.svg)](https://travis-ci.org/fengyuanchen/cropperjs) [![Downloads](https://img.shields.io/npm/dm/cropperjs.svg)](https://www.npmjs.com/package/cropperjs) [![Version](https://img.shields.io/npm/v/cropperjs.svg)](https://www.npmjs.com/package/cropperjs) [![Donate on Patreon](https://img.shields.io/badge/donate-on%20patreon-fa7664.svg)](https://www.patreon.com/chenfengyuan)
+[![Build Status](https://img.shields.io/travis/fengyuanchen/cropperjs.svg)](https://travis-ci.org/fengyuanchen/cropperjs) [![Downloads](https://img.shields.io/npm/dm/cropperjs.svg)](https://www.npmjs.com/package/cropperjs) [![Version](https://img.shields.io/npm/v/cropperjs.svg)](https://www.npmjs.com/package/cropperjs)
 
 > JavaScript image cropper.
 
diff --git a/docs/examples/cropper-in-modal.html b/docs/examples/cropper-in-modal.html
index e10e28323..f36ff4e4e 100644
--- a/docs/examples/cropper-in-modal.html
+++ b/docs/examples/cropper-in-modal.html
@@ -5,7 +5,7 @@
   <meta http-equiv="x-ua-compatible" content="ie=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
   <title>Cropper.js</title>
-  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
+  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
   <link rel="stylesheet" href="../css/cropper.css">
   <style>
     .img-container img {
@@ -45,8 +45,8 @@ <h5 class="modal-title" id="modalLabel">Cropper</h5>
     </div>
   </div>
 
-  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
-  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js"></script>
+  <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>
+  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.bundle.min.js"></script>
   <script src="../js/cropper.js"></script>
   <script>
     window.addEventListener('DOMContentLoaded', function () {
diff --git a/docs/examples/upload-cropped-image-to-server.html b/docs/examples/upload-cropped-image-to-server.html
index 2701db13d..aef0ee58b 100644
--- a/docs/examples/upload-cropped-image-to-server.html
+++ b/docs/examples/upload-cropped-image-to-server.html
@@ -5,7 +5,7 @@
   <meta http-equiv="x-ua-compatible" content="ie=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
   <title>Cropper.js</title>
-  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
+  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
   <link rel="stylesheet" href="../css/cropper.css">
   <style>
     .label {
@@ -59,8 +59,8 @@ <h5 class="modal-title" id="modalLabel">Crop the image</h5>
       </div>
     </div>
   </div>
-  <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
-  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.bundle.min.js"></script>
+  <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
+  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.bundle.min.js"></script>
   <script src="../js/cropper.js"></script>
   <script>
     window.addEventListener('DOMContentLoaded', function () {
diff --git a/docs/index.html b/docs/index.html
index 98c4b4b53..ade3b8782 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -8,7 +8,7 @@
   <meta name="author" content="Chen Fengyuan">
   <title>Cropper.js</title>
   <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css">
-  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
+  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
   <link rel="stylesheet" href="css/cropper.css">
   <link rel="stylesheet" href="css/main.css">
 </head>
@@ -601,8 +601,8 @@ <h5 class="modal-title" id="getCroppedCanvasTitle">Cropped</h5>
   </footer>
 
   <!-- Scripts -->
-  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
-  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.bundle.min.js"></script>
+  <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>
+  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.bundle.min.js"></script>
   <script src="https://fengyuanchen.github.io/shared/google-analytics.js"></script>
   <script src="js/cropper.js"></script>
   <script src="js/main.js"></script>