diff --git a/gui_impl.py b/gui_impl.py
index af4e6aa..850df37 100644
--- a/gui_impl.py
+++ b/gui_impl.py
@@ -102,7 +102,7 @@ def main():
         loop.run_until_complete(ipc.connect())
         try:
             main_window = MainWindow(freq_sample, freq_base, block_size)
-            main_window.show()
+            main_window.showFullScreen()
             ipc.set_close_cb(main_window.close)
             asyncio.ensure_future(ipc.listen(main_window))
             loop.run_forever()