diff --git a/cmd/root.go b/cmd/root.go
index b15941f..eed34f5 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -46,6 +46,6 @@ var RootCommand = &cobra.Command{
 func init() {
 	RootCommand.Flags().DurationVarP(&duration, "duration", "d", 0, "duration with units ns, us (or µs), ms, s, m, h")
 	RootCommand.Flags().IntVarP(&pid, "pid", "p", 0, "process ID")
-	RootCommand.MarkFlagsRequiredTogether("pid", "duration")
+	// RootCommand.MarkFlagsRequiredTogether("pid", "duration")
 	RootCommand.SetVersionTemplate("{{.Version}}\n")
 }