diff --git a/packages/ide/vscode/src/extension/main.ts b/packages/ide/vscode/src/extension/main.ts
index 2b942146f..e84195ba0 100644
--- a/packages/ide/vscode/src/extension/main.ts
+++ b/packages/ide/vscode/src/extension/main.ts
@@ -34,7 +34,7 @@ export function deactivate(): Thenable<void> | undefined {
 }
 
 function startLanguageClient(context: vscode.ExtensionContext): LanguageClient {
-    const serverModule = context.asAbsolutePath(path.join('dist', 'language-server.js'));
+    const serverModule = context.asAbsolutePath(path.join('dist', 'language-server.cjs'));
     // The debug options for the server
     // --inspect=6009: runs the server in Node's Inspector mode so VS Code can attach to the server for debugging.
     // By setting `process.env.DEBUG_BREAK` to a truthy value, the language server will wait until a debugger is attached.