diff --git a/main.py b/main.py
index 4594fda..67d5455 100644
--- a/main.py
+++ b/main.py
@@ -62,7 +62,7 @@ async def send_post(post: E621Post, tag_list: List[str]):
                             webm.write(file.read())
                         ffmpeg\
                             .input(str(src_path)) \
-                            .filter('pad', {
+                            .filter('pad', **{
                                 'width': 'ceil(iw/2)*2',
                                 'height': 'ceil(ih/2)*2',
                                 'x': '0',