diff --git a/custom-fluid-width-and-height/index.html b/custom-fluid-width-and-height/index.html
index 3f4d87f..0ad5c0b 100644
--- a/custom-fluid-width-and-height/index.html
+++ b/custom-fluid-width-and-height/index.html
@@ -26,7 +26,7 @@ <h1><a href="https://github.com/observablehq/examples">Observable Example</a>: <
 <script type="module">
 
 import {Runtime, Inspector, Library} from "https://cdn.jsdelivr.net/npm/@observablehq/runtime@4/dist/runtime.js";
-import notebook from "https://api.observablehq.com/@d3/bar-chart.js?v=3";
+import notebook from "https://api.observablehq.com/@d3/bar-chart@260.js?v=3";
 
 // To avoid the chart itself affecting the size of its container, the chart is
 // absolutely-positioned within the container element that determines the size.
diff --git a/react-create-react-app/package.json b/react-create-react-app/package.json
index 09ac695..70afe14 100644
--- a/react-create-react-app/package.json
+++ b/react-create-react-app/package.json
@@ -9,7 +9,7 @@
     "@testing-library/user-event": "^7.1.2",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
-    "react-scripts": "3.4.1"
+    "react-scripts": "^5.0.1"
   },
   "scripts": {
     "start": "react-scripts start",