diff --git a/abstract-factory/etc/presentation.html b/abstract-factory/etc/presentation.html
index 9e549faf8069a83701814eb0203609f6822e970c..dc1c302b5e0d686d73add8d233347d8c5c4f0ea0 100644
--- a/abstract-factory/etc/presentation.html
+++ b/abstract-factory/etc/presentation.html
@@ -181,7 +181,7 @@ Use the Abstract Factory pattern when:
 * Source code http://java-design-patterns.com/patterns/abstract-factory/
 
     </textarea>
-    <script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
+    <script src="https://remarkjs.com/downloads/remark-latest.min.js">
     </script>
     <script>
       var slideshow = remark.create();
diff --git a/command/etc/presentation.html b/command/etc/presentation.html
index 88a3f0c665810b4236fa3fa89b0a2d8acf4cd55b..6a2ce7471cca961bfff912906e805003e017ff3f 100644
--- a/command/etc/presentation.html
+++ b/command/etc/presentation.html
@@ -234,7 +234,7 @@ Use the Command pattern when you want to:
 * Source code http://java-design-patterns.com/patterns/command/
 
     </textarea>
-    <script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
+    <script src="https://remarkjs.com/downloads/remark-latest.min.js">
     </script>
     <script>
       var slideshow = remark.create();
diff --git a/factory-method/etc/presentation.html b/factory-method/etc/presentation.html
index a7805783656225f18cb7c27e68df9fdf81d63665..2b7c789530dae0b2d14838c673175cf57ce9aa39 100644
--- a/factory-method/etc/presentation.html
+++ b/factory-method/etc/presentation.html
@@ -176,7 +176,7 @@ Use the Factory Method pattern when:
 * Source code http://java-design-patterns.com/patterns/factory-method/
 
     </textarea>
-    <script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
+    <script src="https://remarkjs.com/downloads/remark-latest.min.js">
     </script>
     <script>
       var slideshow = remark.create();