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-rw-r--r--synapse/media/thumbnailer.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/media/thumbnailer.py b/synapse/media/thumbnailer.py
index f909a4fb9a..73d2272f05 100644
--- a/synapse/media/thumbnailer.py
+++ b/synapse/media/thumbnailer.py
@@ -131,7 +131,7 @@ class Thumbnailer:
             else:
                 with self.image:
                     self.image = self.image.convert("RGB")
-        return self.image.resize((width, height), Image.ANTIALIAS)
+        return self.image.resize((width, height), Image.LANCZOS)
 
     def scale(self, width: int, height: int, output_type: str) -> BytesIO:
         """Rescales the image to the given dimensions.