diff --git a/packages/SwingSet/bin/rekernelize.js b/packages/SwingSet/bin/rekernelize.js
new file mode 100755
index 00000000000..2952da5672e
--- /dev/null
+++ b/packages/SwingSet/bin/rekernelize.js
@@ -0,0 +1,43 @@
+#!/usr/bin/env -S node -r esm
+
+/* global require */
+
+import 'node-lmdb';
+import '@agoric/babel-standalone';
+import '@agoric/install-ses';
+
+import path from 'path';
+import process from 'process';
+
+import bundleSource from '@agoric/bundle-source';
+import { openLMDBSwingStore } from '@agoric/swing-store-lmdb';
+
+async function main() {
+  const argv = process.argv.slice(2);
+
+  let dbDir = '.';
+  if (argv.length > 1) {
+    console.error('usage: rekernelize [DBDIR]');
+    process.exit(1);
+  } else if (argv[0]) {
+    dbDir = argv[0];
+  }
+
+  const kernelStateDBDir = path.join(dbDir, 'swingset-kernel-state');
+  const swingStore = openLMDBSwingStore(kernelStateDBDir);
+  const kvStore = swingStore.kvStore;
+  assert(kvStore.get('initialized'), 'kernel store not initialized');
+
+  const kernelBundle = await bundleSource(
+    require.resolve('../src/kernel/kernel.js'),
+  );
+
+  kvStore.set('kernelBundle', JSON.stringify(kernelBundle));
+  swingStore.commit();
+  swingStore.close();
+}
+
+main().then(
+  () => 0,
+  e => console.error(`${e}`, e),
+);