diff --git a/command/swarm/opts.go b/command/swarm/opts.go
index 885a3cd04e..9db46dcf55 100644
--- a/command/swarm/opts.go
+++ b/command/swarm/opts.go
@@ -171,8 +171,8 @@ func parseExternalCA(caSpec string) (*swarm.ExternalCA, error) {
 
 func addSwarmFlags(flags *pflag.FlagSet, opts *swarmOptions) {
 	flags.Int64Var(&opts.taskHistoryLimit, flagTaskHistoryLimit, 5, "Task history retention limit")
-	flags.DurationVar(&opts.dispatcherHeartbeat, flagDispatcherHeartbeat, time.Duration(5*time.Second), "Dispatcher heartbeat period (ns|us|ms|s|m|h) (default 5s)")
-	flags.DurationVar(&opts.nodeCertExpiry, flagCertExpiry, time.Duration(90*24*time.Hour), "Validity period for node certificates (ns|us|ms|s|m|h) (default 2160h0m0s)")
+	flags.DurationVar(&opts.dispatcherHeartbeat, flagDispatcherHeartbeat, time.Duration(5*time.Second), "Dispatcher heartbeat period (ns|us|ms|s|m|h)")
+	flags.DurationVar(&opts.nodeCertExpiry, flagCertExpiry, time.Duration(90*24*time.Hour), "Validity period for node certificates (ns|us|ms|s|m|h)")
 	flags.Var(&opts.externalCA, flagExternalCA, "Specifications of one or more certificate signing endpoints")
 	flags.Uint64Var(&opts.maxSnapshots, flagMaxSnapshots, 0, "Number of additional Raft snapshots to retain")
 	flags.Uint64Var(&opts.snapshotInterval, flagSnapshotInterval, 10000, "Number of log entries between Raft snapshots")