diff --git a/components/mjs/a11y/speech/speech.js b/components/mjs/a11y/speech/speech.js
index d17ba6d74..a4c474b4d 100644
--- a/components/mjs/a11y/speech/speech.js
+++ b/components/mjs/a11y/speech/speech.js
@@ -14,7 +14,7 @@ if (MathJax.loader) {
   } else {
     const REQUIRE = typeof require !== 'undefined' ? require : MathJax.config.loader.require;
     if (REQUIRE?.resolve) {
-      path = REQUIRE.resolve(`${path}/package.json`).replace(/\/[^\/]*$/, '');
+      path = REQUIRE.resolve(`${path}/require.mjs`).replace(/\/[^\/]*$/, '');
       maps = REQUIRE.resolve(`${maps}/base.json`).replace(/\/[^\/]*$/, '');
     } else {
       path = maps = '';
diff --git a/components/mjs/a11y/sre/worker/config.json b/components/mjs/a11y/sre/worker/config.json
index cc2247763..c1303a29f 100644
--- a/components/mjs/a11y/sre/worker/config.json
+++ b/components/mjs/a11y/sre/worker/config.json
@@ -6,7 +6,6 @@
     "to": "../../../../../bundle/sre",
     "from": "../../../../../ts/a11y/sre",
     "copy": [
-      "package.json",
       "require.mjs",
       "require.d.mts"
     ]
diff --git a/components/mjs/a11y/sre/worker/webpack.cjs b/components/mjs/a11y/sre/worker/webpack.cjs
index 29b5bc4de..43ef657fa 100644
--- a/components/mjs/a11y/sre/worker/webpack.cjs
+++ b/components/mjs/a11y/sre/worker/webpack.cjs
@@ -1,8 +1,6 @@
 const webpack = require('webpack');
 
 module.exports = (pkg) => {
-  pkg.experiments = {outputModule: true};
-  pkg.output.library = {type: 'module'};
   pkg.plugins.push(
     new webpack.optimize.LimitChunkCountPlugin({
       maxChunks: 1,
diff --git a/ts/a11y/sre/package.json b/ts/a11y/sre/package.json
deleted file mode 100644
index 3dbc1ca59..000000000
--- a/ts/a11y/sre/package.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}
diff --git a/ts/a11y/sre/speech-worker.ts b/ts/a11y/sre/speech-worker.ts
index ac2da3fed..3dd12a20a 100644
--- a/ts/a11y/sre/speech-worker.ts
+++ b/ts/a11y/sre/speech-worker.ts
@@ -110,11 +110,11 @@ declare const SRE: any;
   //
   // Load SRE
   //
-  await import('./sre.js')
-    .catch((_) => import(/* webpackIgnore: true */ './sre-lab.js')) // for use in the lab
-    .then((SRE) => {
-      global.SRE = SRE;
-    });
+  await (
+    global.isLab
+      ? import(/* webpackIgnore: true */ './sre-lab.js') // for use in the lab
+      : import('./sre.js')
+  ).then((SRE) => (global.SRE = SRE));
 
   /*****************************************************************/
 
diff --git a/ts/adaptors/HTMLAdaptor.ts b/ts/adaptors/HTMLAdaptor.ts
index 1e48c5344..c1a9d68dc 100644
--- a/ts/adaptors/HTMLAdaptor.ts
+++ b/ts/adaptors/HTMLAdaptor.ts
@@ -627,12 +627,12 @@ export class HTMLAdaptor<
     const file = `${path}/${worker}`;
     const content = `
       self.maps = '${quoted(maps)}';
-      import('${quoted(file)}');
+      importScripts('${quoted(file)}');
     `;
     const url = URL.createObjectURL(
       new Blob([content], { type: 'text/javascript' })
     );
-    const webworker = new Worker(url, { type: 'module' });
+    const webworker = new Worker(url);
     webworker.onmessage = listener;
     URL.revokeObjectURL(url);
     return webworker;