diff --git a/pkg/dartpad/lib/dartpad.dart b/pkg/dartpad/lib/dartpad.dart
index 6e17e07b42a..eac21410a88 100644
--- a/pkg/dartpad/lib/dartpad.dart
+++ b/pkg/dartpad/lib/dartpad.dart
@@ -19,7 +19,8 @@ import 'src/worker_client.dart';
 export 'src/dartpad_config.dart' show DartPadConfig;
 export 'src/exceptions.dart' hide rethrowAsDartPadException;
 export 'src/sandbox.dart' show Sandbox;
-export 'src/worker_client.dart' show LanguageServer, Workspace;
+export 'src/worker_client.dart'
+    show HotReloadCompiler, LanguageServer, Workspace;
 
 /// A client for interacting with a DartPad Web Worker.
 final class DartPad extends WorkerClient {
diff --git a/pkg/dartpad_worker/lib/src/asset/sandbox.js b/pkg/dartpad_worker/lib/src/asset/sandbox.js
index e82ae12beed..51ea6d54afd 100644
--- a/pkg/dartpad_worker/lib/src/asset/sandbox.js
+++ b/pkg/dartpad_worker/lib/src/asset/sandbox.js
@@ -321,6 +321,9 @@
 
     try {
       await self.dartDevEmbedder.hotReload(filesToLoad, librariesToReload);
+      if (self.dartDevEmbedder.debugger.extensionNames.includes('ext.flutter.reassemble')) {
+        await self.dartDevEmbedder.debugger.invokeExtension('ext.flutter.reassemble', '{}');
+      }
       return { generation: self.dartDevEmbedder.hotReloadGeneration };
     } catch (e) {
       throw new RpcError(e.message || String(e), errorCode.HOT_RELOAD_FAILED);