diff --git a/uncrust.go b/uncrust.go
index 2a98d77..73d237c 100644
--- a/uncrust.go
+++ b/uncrust.go
@@ -49,7 +49,7 @@ func main() {
 		log.Fatalf("couldn't read body of window id %d: %s\n", wid, e)
 	}
 
-	args := []string{"-l", *fl_lang}
+	args := []string{"--replace", "--no-backup", "-l", *fl_lang}
 	stderr := &bytes.Buffer{}
 	stdout := &bytes.Buffer{}