diff --git a/src/browser_window.py b/src/browser_window.py
index bf8e53c..82ecad8 100644
--- a/src/browser_window.py
+++ b/src/browser_window.py
@@ -6,7 +6,7 @@ from PySide6.QtGui import QAction
 
 from PySide6.QtWebEngineWidgets import QWebEngineView
 from PySide6.QtWebEngineCore import QWebEngineContextMenuRequest
-from PySide6.QtCore import QUrl, Qt
+from PySide6.QtCore import QUrl, Qt, QIODevice, QByteArray, QBuffer
 from pathlib import Path
 import io
 
@@ -96,9 +96,11 @@ class BrowserWindow(QMainWindow):
             return
 
         def handle_pixmap(pix):
-            buffer = io.BytesIO()
+            byte_array = QByteArray()
+            buffer = QBuffer(byte_array)
+            buffer.open(QIODevice.OpenModeFlag.WriteOnly)
             pix.save(buffer, "PNG")
-            png_data = buffer.getvalue()
+            png_data = byte_array.data()
             if self.current_page_id:
                 screenshot_id = save_screenshot(self.current_page_id, png_data)
                 self.prompt_tag(screenshot_id)