diff --git a/change_cdn.py b/change_cdn.py
new file mode 100644
index 00000000..8c3cb381
--- /dev/null
+++ b/change_cdn.py
@@ -0,0 +1,17 @@
+#!/usr/bin/python
+
+
+import os
+
+
+def iter(path):
+    for root, dirs, files in os.walk(path):
+        for fn in files:
+            if fn.endswith(".html"):
+                with open(root + '/' + fn, 'r') as f:
+                    content = f.read()
+                content = content.replace('<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.1.3/ace.js"></script>', '<script src="http://cdn.bootcss.com/ace/1.1.3/ace.js"></script>').replace('<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.1.3/mode-javascript.js"></script>', '<script src="http://cdn.bootcss.com/ace/1.1.3/mode-javascript.js"></script>')
+                with open(root + '/' + fn, 'w') as f:
+                    f.write(content)
+
+iter(os.getcwd())