diff --git a/p5demo/index.html b/p5demo/index.html
index 551634a..cf52c75 100644
--- a/p5demo/index.html
+++ b/p5demo/index.html
@@ -9,8 +9,8 @@
     />
     <title>Spatial Indexing</title>
     <script
-      src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.3.1/p5.min.js"
-      integrity="sha512-gQVBYBvfC+uyor5Teonjr9nmY1bN+DlOCezkhzg4ShpC5q81ogvFsr5IV4xXAj6HEtG7M1Pb2JCha97tVFItYQ=="
+      src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.11.1/p5.min.js"
+      integrity="sha512-265OeMthg1wxVfU0mpNMtNrz2E+OKxJ9CNbmv+oYCxNO93Lgmxq9pwqubnQqkSJgzvsqLju8Mr106tcMlwsZxg=="
       crossorigin="anonymous"
     ></script>
     <script src="./spatial-indexing.umd.js"></script>