diff --git a/tubesync/tubesync/settings.py b/tubesync/tubesync/settings.py
index 9ac82e421..c5686dbfe 100644
--- a/tubesync/tubesync/settings.py
+++ b/tubesync/tubesync/settings.py
@@ -379,6 +379,7 @@
     },
     'postprocessor_args': {
         'videoremuxer+ffmpeg': ['-bsf:v', 'setts=pts=DTS'],
+        'merger+ffmpeg': ['-fflags', '+genpts'],
     },
     'js_runtimes': {
         'deno': {'path': None,},