diff --git a/index.d.ts b/index.d.ts
index 6f1a3d6..6e69b56 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -19,9 +19,11 @@ declare module "browserstack-local" {
     [key: string]: string | boolean;
   }
 
+  type LocalOptions = Partial<Options>;
+
   class Local {
-    start(options: Partial<Options>, callback: (error?: Error) => void): void;
+    start(options: LocalOptions, callback: (error?: Error) => void): void;
     isRunning(): boolean;
-    stop(callback: () => void): void;
+    stop(callback: (error?: Error) => void): void;
   }
 }
diff --git a/package.json b/package.json
index ded8400..ce93a59 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "browserstack-local",
-  "version": "1.4.5",
+  "version": "1.4.6",
   "description": "Nodejs bindings for BrowserStack Local",
   "engine": "^0.10.44",
   "main": "index.js",