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similarity index 100%
rename from __tests__/src/components/WorkspaceElasticWindow.test.js
rename to __tests__/src/components/WorkspaceElasticWindow.test.jsx
diff --git a/__tests__/src/components/WorkspaceExport.test.js b/__tests__/src/components/WorkspaceExport.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceExport.test.js
rename to __tests__/src/components/WorkspaceExport.test.jsx
diff --git a/__tests__/src/components/WorkspaceImport.test.js b/__tests__/src/components/WorkspaceImport.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceImport.test.js
rename to __tests__/src/components/WorkspaceImport.test.jsx
diff --git a/__tests__/src/components/WorkspaceMenu.test.js b/__tests__/src/components/WorkspaceMenu.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceMenu.test.js
rename to __tests__/src/components/WorkspaceMenu.test.jsx
diff --git a/__tests__/src/components/WorkspaceMenuButton.test.js b/__tests__/src/components/WorkspaceMenuButton.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceMenuButton.test.js
rename to __tests__/src/components/WorkspaceMenuButton.test.jsx
diff --git a/__tests__/src/components/WorkspaceMosaic.test.js b/__tests__/src/components/WorkspaceMosaic.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceMosaic.test.js
rename to __tests__/src/components/WorkspaceMosaic.test.jsx
diff --git a/__tests__/src/components/WorkspaceOptionsButton.test.js b/__tests__/src/components/WorkspaceOptionsButton.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceOptionsButton.test.js
rename to __tests__/src/components/WorkspaceOptionsButton.test.jsx
diff --git a/__tests__/src/components/WorkspaceOptionsMenu.test.js b/__tests__/src/components/WorkspaceOptionsMenu.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceOptionsMenu.test.js
rename to __tests__/src/components/WorkspaceOptionsMenu.test.jsx
diff --git a/__tests__/src/components/WorkspaceSelectionDialog.test.js b/__tests__/src/components/WorkspaceSelectionDialog.test.jsx
similarity index 100%
rename from __tests__/src/components/WorkspaceSelectionDialog.test.js
rename to __tests__/src/components/WorkspaceSelectionDialog.test.jsx
diff --git a/__tests__/src/components/ZoomControls.test.js b/__tests__/src/components/ZoomControls.test.jsx
similarity index 100%
rename from __tests__/src/components/ZoomControls.test.js
rename to __tests__/src/components/ZoomControls.test.jsx
diff --git a/__tests__/src/extend/withPlugins.test.js b/__tests__/src/extend/withPlugins.test.jsx
similarity index 100%
rename from __tests__/src/extend/withPlugins.test.js
rename to __tests__/src/extend/withPlugins.test.jsx
diff --git a/__tests__/src/lib/MiradorViewer.test.js b/__tests__/src/lib/MiradorViewer.test.jsx
similarity index 100%
rename from __tests__/src/lib/MiradorViewer.test.js
rename to __tests__/src/lib/MiradorViewer.test.jsx
diff --git a/__tests__/utils/test-utils.js b/__tests__/utils/test-utils.jsx
similarity index 100%
rename from __tests__/utils/test-utils.js
rename to __tests__/utils/test-utils.jsx
diff --git a/eslint.config.js b/eslint.config.js
index c155a8610f..20617cc1b3 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -75,7 +75,7 @@ export default [
       'import/no-duplicates': 'error',
       'import/no-extraneous-dependencies': 'off',
       'import/no-mutable-exports': 'error',
-      'import/no-unresolved': [2, { ignore: ['test-utils', '@vitejs/plugin-react'] }],
+      'import/no-unresolved': [2, { ignore: ['test-utils', '@vitejs/plugin-react', 'vite'] }],
       'import/prefer-default-export': 'off',
       'max-depth': ['warn', 4],
       'max-params': ['warn', 5],
diff --git a/netlify.toml b/netlify.toml
index bf2f5eb531..557192c4b9 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -5,10 +5,10 @@
   publish = "dist/"
 
 [context.main.environment]
-  NODE_VERSION = "20.18.1"
+  NODE_VERSION = "22.12.0"
 
 [context.deploy-preview.environment]
-  NODE_VERSION = "20.18.1"
+  NODE_VERSION = "22.12.0"
 
 [[redirects]]
   from = "/"
diff --git a/package.json b/package.json
index a2d71a1c0f..75e785efa5 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
     "@testing-library/jest-dom": "^6.1.5",
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.4.3",
-    "@vitejs/plugin-react": "^5.2.0",
+    "@vitejs/plugin-react": "^6.0.1",
     "@vitest/coverage-v8": "^4.1.2",
     "@vitest/ui": "^4.1.2",
     "bundlewatch": "^0.4.0",
@@ -112,7 +112,7 @@
     "react-i18next": "^13.0.0 || ^14.0.0 || ^15.0.0",
     "redux-mock-store": "^1.5.1",
     "redux-saga-test-plan": "^4.0.0-rc.3",
-    "vite": "^7.3.1",
+    "vite": "^8.0.3",
     "vitest": "^4.1.2",
     "vitest-fetch-mock": "^0.4.2"
   },
diff --git a/vite.config.js b/vite.config.js
index ce4fd98a2f..dba101f9ed 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -6,6 +6,8 @@ import { fileURLToPath } from 'url';
 import { globSync } from 'glob';
 import * as packageJson from './package.json';
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 /**
 * Vite configuration
 */
@@ -13,7 +15,7 @@ export default defineConfig({
   ...(
     process.env.NETLIFY ? {
       build: {
-        rollupOptions: {
+        rolldownOptions: {
           external: ['__tests__/*', '__mocks__/*'],
           input: Object.fromEntries(
             globSync('./demo/*.html').map((file) => [
@@ -39,11 +41,11 @@ export default defineConfig({
           formats: ['es'],
           name: 'Mirador',
         },
-        rollupOptions: {
+        rolldownOptions: {
           external: (id, parentId) => {
             const peers = Object.keys(packageJson.peerDependencies);
             return peers.indexOf(id) > -1
-              || peers.find((peer) => id.startsWith(`${peer}/`))
+              || peers.some((peer) => id.startsWith(`${peer}/`))
               || id.startsWith('__tests__/')
               || id.startsWith('__mocks__/');
           },
diff --git a/vitest.config.ts b/vitest.config.ts
index d8959d6e16..d93069e8b1 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -1,30 +1,11 @@
 /// <reference types="vitest" />
-import { defineConfig } from 'vite';
+import { defineConfig } from 'vitest/config';
 import react from '@vitejs/plugin-react';
 import { fileURLToPath } from 'url';
-import fs from 'fs/promises';
-
 export default defineConfig({
-  esbuild: {
+  oxc: {
     exclude: [],
     include: /(src|__tests__)\/.*\.jsx?$/,
-    loader: 'jsx',
-  },
-  optimizeDeps: {
-    esbuildOptions: {
-      plugins: [
-        {
-          name: 'load-js-files-as-jsx',
-          /** */
-          setup(build) {
-            build.onLoad({ filter: /(src|__tests__)\/.*\.js$/ }, async (args) => ({
-              contents: await fs.readFile(args.path, 'utf8'),
-              loader: 'jsx',
-            }));
-          },
-        },
-      ],
-    },
   },
   plugins: [react()],
   resolve: {