diff --git a/internal/dl/ytdlp.go b/internal/dl/ytdlp.go
index 733d56b..0e84b18 100644
--- a/internal/dl/ytdlp.go
+++ b/internal/dl/ytdlp.go
@@ -265,6 +265,7 @@ func (c *Client) StartDownload(job *domain.DownloadJob, downloadDir string) (<-c
 	slog.Info("starting download", "url", job.URL, "format", formatID)
 
 	cmd := exec.Command(c.binaryPath, args...)
+	cmd.Env = append(os.Environ(), "PYTHONUNBUFFERED=1")
 
 	stderr, err := cmd.StderrPipe()
 	if err != nil {