diff --git a/lib/pleroma/uploaders/s3.ex b/lib/pleroma/uploaders/s3.ex
index 481153fe8..cae92cf2c 100644
--- a/lib/pleroma/uploaders/s3.ex
+++ b/lib/pleroma/uploaders/s3.ex
@@ -33,14 +33,14 @@ def put_file(%Pleroma.Upload{} = upload) do
         upload.tempfile
         |> ExAws.S3.Upload.stream_file()
         |> ExAws.S3.upload(bucket, s3_name, [
-          {:acl, :public_read},
+          {:acl, :private},
           {:content_type, upload.content_type}
         ])
       else
         {:ok, file_data} = File.read(upload.tempfile)
 
         ExAws.S3.put_object(bucket, s3_name, file_data, [
-          {:acl, :public_read},
+          {:acl, :private},
           {:content_type, upload.content_type}
         ])
       end