diff --git a/src/main.py b/src/main.py
index 6c89616..9e2757d 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1392,7 +1392,7 @@ def OnFlipLeftRightToolButton(self, checked):
             self.InitTool()
             pixmap = self.getCurrentLayerLatestPixmap()
             pil = self.QPixmapToImage(pixmap)
-            pil = pil.transpose(Image.FLIP_LEFT_RIGHT)
+            pil = pil.transpose(Image.Transpose.FLIP_LEFT_RIGHT)
             updatedPixmap = self.ImageToQPixmap(pil)
             self.image_viewer.setImage(updatedPixmap, True, "Flip Left-Right", "Tool", None, None)
         self.FlipLeftRightToolButton.setChecked(False)
@@ -1402,7 +1402,7 @@ def OnFlipTopBottomToolButton(self, checked):
             self.InitTool()
             pixmap = self.getCurrentLayerLatestPixmap()
             pil = self.QPixmapToImage(pixmap)
-            pil = pil.transpose(Image.FLIP_TOP_BOTTOM)
+            pil = pil.transpose(Image.Transpose.FLIP_TOP_BOTTOM)
             updatedPixmap = self.ImageToQPixmap(pil)
             self.image_viewer.setImage(updatedPixmap, True, "Flip Top-Bottom", "Tool", None, None)
         self.FlipTopBottomToolButton.setChecked(False)
@@ -1992,4 +1992,4 @@ def main():
     os.environ['QT_IMAGEIO_MAXALLOC'] = "1024"
     # QtGui.QImageReader.setAllocationLimit(0)
 
-    main()
\ No newline at end of file
+    main()