diff --git a/ts/smartpuppeteer.classes.incognitobrowser.ts b/ts/smartpuppeteer.classes.incognitobrowser.ts
index 9fa093c..eaf43af 100644
--- a/ts/smartpuppeteer.classes.incognitobrowser.ts
+++ b/ts/smartpuppeteer.classes.incognitobrowser.ts
@@ -28,7 +28,7 @@ export class IncognitoBrowser {
    */
   public async stop() {
     this.status = 'stopped';
-    plugins.treeKill(this.browser.process().pid);
+    plugins.treeKill(this.browser.process().pid, 'SIGKILL');
     await this.browser.close();
   }