diff --git a/cors/postmessage.html b/cors/postmessage.html
index 536e8b3..3f37e40 100644
--- a/cors/postmessage.html
+++ b/cors/postmessage.html
@@ -16,8 +16,8 @@
     <meta charset="utf-8" />
     <title>jQuery File Upload Plugin postMessage API</title>
     <script
-      src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"
-      integrity="sha384-xBuQ/xzmlsLoJpyjoggmTEz8OWUFM0/RC5BsqQBDX2v5cMvDHcMakNTNrHIW2I5f"
+      src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"
+      integrity="sha384-nvAa0+6Qg9clwYCGGPpDQLVpLNn0fRaROjHqs13t4Ggj3Ez50XnGQqc/r8MhnRDZ"
       crossorigin="anonymous"
     ></script>
   </head>
diff --git a/index.html b/index.html
index 62033e7..7652395 100644
--- a/index.html
+++ b/index.html
@@ -296,8 +296,8 @@
       {% } %}
     </script>
     <script
-      src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"
-      integrity="sha384-vk5WoKIaW/vJyUAd9n/wmopsmNhiy+L2Z+SBxGYnUkunIxVxAv/UtMOhba/xskxh"
+      src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"
+      integrity="sha384-nvAa0+6Qg9clwYCGGPpDQLVpLNn0fRaROjHqs13t4Ggj3Ez50XnGQqc/r8MhnRDZ"
       crossorigin="anonymous"
     ></script>
     <!-- The jQuery UI widget factory, can be omitted if jQuery UI is already included -->