diff --git a/main.py b/main.py
index 5ccd53c..bd6305e 100644
--- a/main.py
+++ b/main.py
@@ -65,11 +65,13 @@ async def check_updates():
                                                          caption=caption)
                             elif post.file.ext in ('png', 'jpg'):
                                 if post.file.size > 10000000:
-                                    im = Image.open(file)
-                                    im.thumbnail((2048, 2048), Image.LANCZOS)
+                                    dl_im = Image.open(file).convert('RGBA')
+                                    dl_im.thumbnail((2048, 2048), Image.LANCZOS)
+                                    im = Image.new('RGBA', dl_im.size, (255, 255, 255))
+                                    composite = Image.alpha_composite(im, dl_im).convert('RGB')
                                     file.truncate(0)
-                                    im.save(file, format='JPEG')
-                                    im.seek(0)
+                                    composite.save(file, format='JPEG')
+                                    file.seek(0)
                                 await bot.send_photo(int(os.environ['SEND_CHAT']),
                                                      file,
                                                      caption=caption)