diff --git a/examples/index-bs3.html b/examples/index-bs3.html
index 3b2d941a..b174b878 100644
--- a/examples/index-bs3.html
+++ b/examples/index-bs3.html
@@ -200,9 +200,9 @@ <h4>Test <code>addToStack</code></h4>
         overwriteInitial: false,
         initialPreviewAsData: true,
         initialPreview: [
-            "http://lorempixel.com/1920/1080/transport/1",
-            "http://lorempixel.com/1920/1080/transport/2",
-            "http://lorempixel.com/1920/1080/transport/3"
+            "https://dummyimage.com/640x360/a0f.png&text=Transport+1",
+            "https://dummyimage.com/640x360/a0f.png&text=Transport+2",
+            "https://dummyimage.com/640x360/a0f.png&text=Transport+3"
         ],
         initialPreviewConfig: [
             {caption: "transport-1.jpg", size: 329892, width: "120px", url: "{$url}", key: 1},
@@ -246,9 +246,9 @@ <h4>Test <code>addToStack</code></h4>
             overwriteInitial: false,
             initialPreviewAsData: true,
             initialPreview: [
-                "http://lorempixel.com/1920/1080/nature/1",
-                "http://lorempixel.com/1920/1080/nature/2",
-                "http://lorempixel.com/1920/1080/nature/3"
+                "https://dummyimage.com/1920x1080/1aa.png&text=Nature+1",
+                "https://dummyimage.com/1920x1080/2ef.png&text=Nature+2",
+                "https://dummyimage.com/1920x1080/3f0.png&text=Nature+3"
             ],
             initialPreviewConfig: [
                 {caption: "nature-1.jpg", size: 329892, width: "120px", url: "{$url}", key: 1},
diff --git a/examples/index-bs4.html b/examples/index-bs4.html
index 48a33c1b..30613658 100644
--- a/examples/index-bs4.html
+++ b/examples/index-bs4.html
@@ -197,9 +197,9 @@ <h4>Test <code>addToStack</code></h4>
         overwriteInitial: false,
         initialPreviewAsData: true,
         initialPreview: [
-            "http://lorempixel.com/1920/1080/transport/1",
-            "http://lorempixel.com/1920/1080/transport/2",
-            "http://lorempixel.com/1920/1080/transport/3"
+            "https://dummyimage.com/640x360/a0f.png&text=Transport+1",
+            "https://dummyimage.com/640x360/a0f.png&text=Transport+2",
+            "https://dummyimage.com/640x360/a0f.png&text=Transport+3"
         ],
         initialPreviewConfig: [
             {caption: "transport-1.jpg", size: 329892, width: "120px", url: "{$url}", key: 1},
@@ -243,9 +243,9 @@ <h4>Test <code>addToStack</code></h4>
             overwriteInitial: false,
             initialPreviewAsData: true,
             initialPreview: [
-                "http://lorempixel.com/1920/1080/nature/1",
-                "http://lorempixel.com/1920/1080/nature/2",
-                "http://lorempixel.com/1920/1080/nature/3"
+                "https://dummyimage.com/1920x1080/1aa.png&text=Nature+1",
+                "https://dummyimage.com/1920x1080/2ef.png&text=Nature+2",
+                "https://dummyimage.com/1920x1080/3f0.png&text=Nature+3"
             ],
             initialPreviewConfig: [
                 {caption: "nature-1.jpg", size: 329892, width: "120px", url: "{$url}", key: 1},