diff --git a/package.json b/package.json
index 401f333..586cb1a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@webbtc/webln-types",
   "description": "Type definitions for WebLN",
-  "version": "2.1.0",
+  "version": "3.0.0",
   "types": "types/index.d.ts",
   "repository": {
     "type": "git",
diff --git a/types/index.d.ts b/types/index.d.ts
index 3217682..3f1b270 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -77,12 +77,13 @@ interface GetBalanceResponse {
 }
 
 interface LookupInvoiceArgs {
-  invoice?: string;
-  payment_hash?: string;
+  paymentRequest?: string;
+  paymentHash?: string;
 }
 
 interface LookupInvoiceResponse {
   paymentRequest: string;
+  preimage?: string;
   paid: boolean;
 }