diff --git a/packages/subproviders/README.md b/packages/subproviders/README.md
index 0d8f85910c..9547297139 100644
--- a/packages/subproviders/README.md
+++ b/packages/subproviders/README.md
@@ -20,10 +20,10 @@ import {
     LedgerSubprovider,
 } from '@0xproject/subproviders';
 
-const ledgerSubprovider = new LedgerSubprovider(
+const ledgerSubprovider = new LedgerSubprovider({
     networkId,
     ledgerEthereumClientFactoryAsync,
-);
+});
 
 const accounts = await ledgerSubprovider.getAccountsAsync();
 ```