diff --git a/pkg/morph/client/client.go b/pkg/morph/client/client.go
index e63d926e0..a7c3c6d8d 100644
--- a/pkg/morph/client/client.go
+++ b/pkg/morph/client/client.go
@@ -60,6 +60,7 @@ type Client struct {
 	rpcActor *actor.Actor        // neo-go RPC actor
 	gasToken *nep17.Token        // neo-go GAS token wrapper
 	rolemgmt *rolemgmt.Contract  // neo-go Designation contract wrapper
+	nnsHash  util.Uint160        // NNS contract hash
 
 	acc     *wallet.Account // neo account
 	accAddr util.Uint160    // account's address
@@ -94,27 +95,12 @@ type Client struct {
 type cache struct {
 	m sync.RWMutex
 
-	nnsHash   *util.Uint160
 	gKey      *keys.PublicKey
 	txHeights *lru.Cache[util.Uint256, uint32]
 
 	metrics metrics.MorphCacheMetrics
 }
 
-func (c *cache) nns() *util.Uint160 {
-	c.m.RLock()
-	defer c.m.RUnlock()
-
-	return c.nnsHash
-}
-
-func (c *cache) setNNSHash(nnsHash util.Uint160) {
-	c.m.Lock()
-	defer c.m.Unlock()
-
-	c.nnsHash = &nnsHash
-}
-
 func (c *cache) groupKey() *keys.PublicKey {
 	c.m.RLock()
 	defer c.m.RUnlock()
@@ -133,7 +119,6 @@ func (c *cache) invalidate() {
 	c.m.Lock()
 	defer c.m.Unlock()
 
-	c.nnsHash = nil
 	c.gKey = nil
 	c.txHeights.Purge()
 }
diff --git a/pkg/morph/client/constructor.go b/pkg/morph/client/constructor.go
index d061747bb..e4dcd0db7 100644
--- a/pkg/morph/client/constructor.go
+++ b/pkg/morph/client/constructor.go
@@ -145,6 +145,11 @@ func New(ctx context.Context, key *keys.PrivateKey, opts ...Option) (*Client, er
 	if cli.client == nil {
 		return nil, ErrNoHealthyEndpoint
 	}
+	cs, err := cli.client.GetContractStateByID(nnsContractID)
+	if err != nil {
+		return nil, fmt.Errorf("resolve nns hash: %w", err)
+	}
+	cli.nnsHash = cs.Hash
 	cli.setActor(act)
 
 	go cli.closeWaiter(ctx)
diff --git a/pkg/morph/client/nns.go b/pkg/morph/client/nns.go
index f292dccf1..b03967fdd 100644
--- a/pkg/morph/client/nns.go
+++ b/pkg/morph/client/nns.go
@@ -61,11 +61,7 @@ func (c *Client) NNSContractAddress(name string) (sh util.Uint160, err error) {
 		return util.Uint160{}, ErrConnectionLost
 	}
 
-	nnsHash, err := c.NNSHash()
-	if err != nil {
-		return util.Uint160{}, err
-	}
-
+	nnsHash := c.NNSHash()
 	sh, err = nnsResolve(c.client, nnsHash, name)
 	if err != nil {
 		return sh, fmt.Errorf("NNS.resolve: %w", err)
@@ -74,34 +70,8 @@ func (c *Client) NNSContractAddress(name string) (sh util.Uint160, err error) {
 }
 
 // NNSHash returns NNS contract hash.
-func (c *Client) NNSHash() (util.Uint160, error) {
-	c.switchLock.RLock()
-	defer c.switchLock.RUnlock()
-
-	if c.inactive {
-		return util.Uint160{}, ErrConnectionLost
-	}
-
-	success := false
-	startedAt := time.Now()
-
-	defer func() {
-		c.cache.metrics.AddMethodDuration("NNSContractHash", success, time.Since(startedAt))
-	}()
-
-	nnsHash := c.cache.nns()
-
-	if nnsHash == nil {
-		cs, err := c.client.GetContractStateByID(nnsContractID)
-		if err != nil {
-			return util.Uint160{}, fmt.Errorf("NNS contract state: %w", err)
-		}
-
-		c.cache.setNNSHash(cs.Hash)
-		nnsHash = &cs.Hash
-	}
-	success = true
-	return *nnsHash, nil
+func (c *Client) NNSHash() util.Uint160 {
+	return c.nnsHash
 }
 
 func nnsResolveItem(c *rpcclient.WSClient, nnsHash util.Uint160, domain string) (stackitem.Item, error) {
@@ -241,11 +211,7 @@ func (c *Client) contractGroupKey() (*keys.PublicKey, error) {
 		return gKey, nil
 	}
 
-	nnsHash, err := c.NNSHash()
-	if err != nil {
-		return nil, err
-	}
-
+	nnsHash := c.NNSHash()
 	item, err := nnsResolveItem(c.client, nnsHash, NNSGroupKeyName)
 	if err != nil {
 		return nil, err