diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index 1162af7..a5e3a34 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -28,7 +28,12 @@
     {{ partialCached "footer.html" . .Layout .Kind (.Param "hideFooter") (.Param "ShowCodeCopyButtons") -}}
 </body>
 {{ if .Page.Store.Get "hasMermaid" }}
-  <script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
+  <script
+      src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/9.1.5/mermaid.min.js"
+      integrity="sha512-ETySttxD+gVb33UXscT3G5gtPxWepHF6fs69M13VEzJfvA6wcDwMjmkCHwrH4NPzPzMarhk/aZoVsY7BTGfnQw=="
+      crossorigin="anonymous"
+      referrerpolicy="no-referrer">
+  </script>
   <script>
     mermaid.initialize({ startOnLoad: true });
   </script>