diff --git a/cmd/frostfs-adm/internal/modules/morph/notary/notary.go b/cmd/frostfs-adm/internal/modules/morph/notary/notary.go
index 7058818c0..3435926c0 100644
--- a/cmd/frostfs-adm/internal/modules/morph/notary/notary.go
+++ b/cmd/frostfs-adm/internal/modules/morph/notary/notary.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
-	"strconv"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-adm/internal/commonflags"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-adm/internal/modules/morph/helper"
@@ -74,16 +73,9 @@ func depositNotary(cmd *cobra.Command, _ []string) error {
 		return err
 	}
 
-	till := int64(defaultNotaryDepositLifetime)
-	tillStr, err := cmd.Flags().GetString(notaryDepositTillFlag)
-	if err != nil {
-		return err
-	}
-	if tillStr != "" {
-		till, err = strconv.ParseInt(tillStr, 10, 64)
-		if err != nil || till <= 0 {
-			return errInvalidNotaryDepositLifetime
-		}
+	till, _ := cmd.Flags().GetInt64(notaryDepositTillFlag)
+	if till <= 0 {
+		return errInvalidNotaryDepositLifetime
 	}
 
 	return transferGas(cmd, acc, accHash, gasAmount, till)
diff --git a/cmd/frostfs-adm/internal/modules/morph/notary/root.go b/cmd/frostfs-adm/internal/modules/morph/notary/root.go
index 497ff8ea1..d7be2e503 100644
--- a/cmd/frostfs-adm/internal/modules/morph/notary/root.go
+++ b/cmd/frostfs-adm/internal/modules/morph/notary/root.go
@@ -20,7 +20,7 @@ func initDepositoryNotaryCmd() {
 	DepositCmd.Flags().String(commonflags.StorageWalletFlag, "", "Path to storage node wallet")
 	DepositCmd.Flags().String(walletAccountFlag, "", "Wallet account address")
 	DepositCmd.Flags().String(commonflags.RefillGasAmountFlag, "", "Amount of GAS to deposit")
-	DepositCmd.Flags().String(notaryDepositTillFlag, "", "Notary deposit duration in blocks")
+	DepositCmd.Flags().Int64(notaryDepositTillFlag, defaultNotaryDepositLifetime, "Notary deposit duration in blocks")
 }
 
 func init() {