diff --git a/pkg/morph/client/balance/balanceOf.go b/pkg/morph/client/balance/balanceOf.go
index c3aec323d2..0eec19b77a 100644
--- a/pkg/morph/client/balance/balanceOf.go
+++ b/pkg/morph/client/balance/balanceOf.go
@@ -19,7 +19,7 @@ func (c *Client) BalanceOf(id *owner.ID) (*big.Int, error) {
 
 	invokePrm := client.TestInvokePrm{}
 	invokePrm.SetMethod(balanceOfMethod)
-	invokePrm.SetArgs(h.BytesBE())
+	invokePrm.SetArgs(h)
 
 	prms, err := c.client.TestInvoke(invokePrm)
 	if err != nil {
diff --git a/pkg/morph/client/balance/burn.go b/pkg/morph/client/balance/burn.go
index b86807c631..7d148a4fdf 100644
--- a/pkg/morph/client/balance/burn.go
+++ b/pkg/morph/client/balance/burn.go
@@ -33,7 +33,7 @@ func (b *BurnPrm) SetID(id []byte) {
 func (c *Client) Burn(p BurnPrm) error {
 	prm := client.InvokePrm{}
 	prm.SetMethod(burnMethod)
-	prm.SetArgs(p.to.BytesBE(), p.amount, p.id)
+	prm.SetArgs(p.to, p.amount, p.id)
 	prm.InvokePrmOptional = p.InvokePrmOptional
 
 	return c.client.Invoke(prm)
diff --git a/pkg/morph/client/balance/lock.go b/pkg/morph/client/balance/lock.go
index 34042c10b0..1ef31cbf1b 100644
--- a/pkg/morph/client/balance/lock.go
+++ b/pkg/morph/client/balance/lock.go
@@ -45,7 +45,7 @@ func (l *LockPrm) SetDueEpoch(dueEpoch int64) {
 func (c *Client) Lock(p LockPrm) error {
 	prm := client.InvokePrm{}
 	prm.SetMethod(lockMethod)
-	prm.SetArgs(p.id, p.user.BytesBE(), p.lock.BytesBE(), p.amount, p.dueEpoch)
+	prm.SetArgs(p.id, p.user, p.lock, p.amount, p.dueEpoch)
 	prm.InvokePrmOptional = p.InvokePrmOptional
 
 	return c.client.Invoke(prm)
diff --git a/pkg/morph/client/balance/mint.go b/pkg/morph/client/balance/mint.go
index c7a89b5035..b52727a9fc 100644
--- a/pkg/morph/client/balance/mint.go
+++ b/pkg/morph/client/balance/mint.go
@@ -33,7 +33,7 @@ func (m *MintPrm) SetID(id []byte) {
 func (c *Client) Mint(p MintPrm) error {
 	prm := client.InvokePrm{}
 	prm.SetMethod(mintMethod)
-	prm.SetArgs(p.to.BytesBE(), p.amount, p.id)
+	prm.SetArgs(p.to, p.amount, p.id)
 	prm.InvokePrmOptional = p.InvokePrmOptional
 
 	return c.client.Invoke(prm)
diff --git a/pkg/morph/client/balance/transfer.go b/pkg/morph/client/balance/transfer.go
index 8c9330c4c3..691bca2c3f 100644
--- a/pkg/morph/client/balance/transfer.go
+++ b/pkg/morph/client/balance/transfer.go
@@ -36,7 +36,7 @@ func (c *Client) TransferX(p TransferPrm) error {
 
 	prm := client.InvokePrm{}
 	prm.SetMethod(transferXMethod)
-	prm.SetArgs(from.BytesBE(), to.BytesBE(), p.Amount, p.Details)
+	prm.SetArgs(from, to, p.Amount, p.Details)
 	prm.InvokePrmOptional = p.InvokePrmOptional
 
 	err = c.client.Invoke(prm)
diff --git a/pkg/morph/client/neofs/cheque.go b/pkg/morph/client/neofs/cheque.go
index 96f76cd673..0e384afa08 100644
--- a/pkg/morph/client/neofs/cheque.go
+++ b/pkg/morph/client/neofs/cheque.go
@@ -40,7 +40,7 @@ func (c *ChequePrm) SetLock(lock util.Uint160) {
 func (x *Client) Cheque(p ChequePrm) error {
 	prm := client.InvokePrm{}
 	prm.SetMethod(chequeMethod)
-	prm.SetArgs(p.id, p.user.BytesBE(), p.amount, p.lock.BytesBE())
+	prm.SetArgs(p.id, p.user, p.amount, p.lock)
 	prm.InvokePrmOptional = p.InvokePrmOptional
 
 	return x.client.Invoke(prm)