diff --git a/swarm_update.go b/swarm_update.go
index f0be145ba2..cc8eeb6554 100644
--- a/swarm_update.go
+++ b/swarm_update.go
@@ -15,6 +15,7 @@ func (cli *Client) SwarmUpdate(ctx context.Context, version swarm.Version, swarm
 	query.Set("version", strconv.FormatUint(version.Index, 10))
 	query.Set("rotateWorkerToken", fmt.Sprintf("%v", flags.RotateWorkerToken))
 	query.Set("rotateManagerToken", fmt.Sprintf("%v", flags.RotateManagerToken))
+	query.Set("rotateManagerUnlockKey", fmt.Sprintf("%v", flags.RotateManagerUnlockKey))
 	resp, err := cli.post(ctx, "/swarm/update", query, swarm, nil)
 	ensureReaderClosed(resp)
 	return err