diff --git a/cmd/neofs-adm/internal/modules/morph/root.go b/cmd/neofs-adm/internal/modules/morph/root.go
index dd1dec03f..619615656 100644
--- a/cmd/neofs-adm/internal/modules/morph/root.go
+++ b/cmd/neofs-adm/internal/modules/morph/root.go
@@ -188,6 +188,16 @@ var (
 		RunE: updateContracts,
 	}
 
+	hardcodeNNSCmd = &cobra.Command{
+		Use:   "hardcode-nns",
+		Short: "FIX for mainnet update",
+		PreRun: func(cmd *cobra.Command, _ []string) {
+			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
+			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
+		},
+		RunE: hardcodeNNS,
+	}
+
 	dumpContainersCmd = &cobra.Command{
 		Use:   "dump-containers",
 		Short: "Dump NeoFS containers to file",
@@ -274,6 +284,10 @@ func init() {
 	dumpBalancesCmd.Flags().BoolP(dumpBalancesProxyFlag, "p", false, "dump balances of the proxy contract")
 	dumpBalancesCmd.Flags().Bool(dumpBalancesUseScriptHashFlag, false, "use script-hash format for addresses")
 
+	RootCmd.AddCommand(hardcodeNNSCmd)
+	hardcodeNNSCmd.Flags().String(alphabetWalletsFlag, "", "path to alphabet wallets dir")
+	hardcodeNNSCmd.Flags().StringP(endpointFlag, "r", "", "N3 RPC node endpoint")
+
 	RootCmd.AddCommand(updateContractsCmd)
 	updateContractsCmd.Flags().String(alphabetWalletsFlag, "", "path to alphabet wallets dir")
 	updateContractsCmd.Flags().StringP(endpointFlag, "r", "", "N3 RPC node endpoint")
diff --git a/cmd/neofs-adm/internal/modules/morph/update.go b/cmd/neofs-adm/internal/modules/morph/update.go
index 90b6d6558..0ec3153b2 100644
--- a/cmd/neofs-adm/internal/modules/morph/update.go
+++ b/cmd/neofs-adm/internal/modules/morph/update.go
@@ -3,6 +3,11 @@ package morph
 import (
 	"fmt"
 
+	"github.com/nspcc-dev/neo-go/pkg/io"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
+	"github.com/nspcc-dev/neofs-contract/nns"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -19,3 +24,57 @@ func updateContracts(cmd *cobra.Command, _ []string) error {
 
 	return wCtx.updateContracts()
 }
+
+func hardcodeNNS(cmd *cobra.Command, _ []string) error {
+	c, err := newInitializeContext(cmd, viper.GetViper())
+	if err != nil {
+		return fmt.Errorf("initialization error: %w", err)
+	}
+
+	/* FIX for mainnet, set hardcoded hashes. */
+	hashes := map[string]string{
+		"neofs.neofs":      "2cafa46838e8b564468ebd868dcafdd99dce6221",
+		"audit.neofs":      "85fe181f4aa3cbdc94023d97c69001ece0730398",
+		"balance.neofs":    "dc1ec98d9d0c5f9dfade16144defe08cffc5ca55",
+		"container.neofs":  "1b6e68d299b570e1cb7e86eadfdc06aa2e8e0cc5",
+		"neofsid.neofs":    "0a64ce753653cc97c0467e1334d9d3678ca8c682",
+		"netmap.neofs":     "7c5bdb23e36cc7cce95bf42f3ab9e452c2501df1",
+		"reputation.neofs": "7ad824fd1eeb1565be2cee3889214b9aa605d2fc",
+		"subnet.neofs":     "70d5b161d7fc7f6ba32d324d88bf74327f15ca8d",
+		/* "az": */ getAlphabetNNSDomain(0): "2392438eb31100857c0f161c66791872b249aa13",
+		/* "buky": */ getAlphabetNNSDomain(1): "83ef4226d5d6519ca9c99a5de13b1b5ca223a6ad",
+		/* "vedi": */ getAlphabetNNSDomain(2): "6250927beaa9aa5a00171379dcb7187b0c91d17d",
+		/* "glagoli": */ getAlphabetNNSDomain(3): "1d6a2519ba41a139b2ced1bfd5013938271a7578",
+		/* "dobro": */ getAlphabetNNSDomain(4): "b65fc7a3c31cf57a90d7eb1c0e9909e4ca69133c",
+		/* "yest": */ getAlphabetNNSDomain(5): "f95b6ff8cd3b027c9911c18115518ad8c5d2f591",
+		/* "zhivete": */ getAlphabetNNSDomain(6): "5b17c579bf56884fd68af152432b3b5aee7aee76",
+	}
+
+	nnsCs, err := c.Client.GetContractStateByID(1)
+	if err != nil {
+		panic(err)
+	}
+
+	w := io.NewBufBinWriter()
+	for name, sh := range hashes {
+		h, err := util.Uint160DecodeStringLE(sh)
+		if err != nil {
+			return fmt.Errorf("invalid hash: %s", sh)
+		}
+		cs, err := c.Client.GetContractStateByHash(h)
+		if err != nil || cs.Hash != h {
+			return fmt.Errorf("contract %s should have hash %s, but: %w", name, sh, err)
+		}
+		emit.AppCall(w.BinWriter, nnsCs.Hash, "addRecord", callflag.All,
+			name, int64(nns.TXT), h.StringLE())
+		c.Command.Printf("NNS: Set %s -> %s\n", name, h.StringLE())
+	}
+	if w.Err != nil {
+		panic(w.Err)
+	}
+
+	if err := c.sendCommitteeTx(w.Bytes(), -1, false); err != nil {
+		return err
+	}
+	return c.awaitTx()
+}