diff --git a/modules/cv2win32.py b/modules/cv2win32.py
index b9641263..bc85abc4 100644
--- a/modules/cv2win32.py
+++ b/modules/cv2win32.py
@@ -6,6 +6,7 @@ def show_preview(flag, img, title=None):
         title = flag
     cv2.imshow(flag, img)
     cv2.setWindowTitle(flag, title)
+    cv2.setWindowProperty(flag, cv2.WND_PROP_TOPMOST, 1)
     cv2.waitKey(1)