diff --git a/electron-projects/ucap-webmessenger-electron/src/app/AppWindow.ts b/electron-projects/ucap-webmessenger-electron/src/app/AppWindow.ts
index e6aae927..d0196aa4 100644
--- a/electron-projects/ucap-webmessenger-electron/src/app/AppWindow.ts
+++ b/electron-projects/ucap-webmessenger-electron/src/app/AppWindow.ts
@@ -61,6 +61,7 @@ export class AppWindow {
       },
       acceptFirstMouse: true,
       icon: this.appIconPath,
+      fullscreenable: false,
       show: false
     };