diff --git a/pkg/rpc/request/param.go b/pkg/rpc/request/param.go
index 33ddfbea1..45249257b 100644
--- a/pkg/rpc/request/param.go
+++ b/pkg/rpc/request/param.go
@@ -69,6 +69,7 @@ const (
 	defaultT paramType = iota
 	StringT
 	NumberT
+	BooleanT
 	ArrayT
 	FuncParamT
 	BlockFilterT
@@ -106,6 +107,8 @@ func (p *Param) GetBoolean() bool {
 		return p.Value != 0
 	case StringT:
 		return p.Value != ""
+	case BooleanT:
+		return p.Value == true
 	default:
 		return true
 	}
@@ -263,9 +266,11 @@ func (p Param) GetSignersWithWitnesses() ([]transaction.Signer, []transaction.Wi
 func (p *Param) UnmarshalJSON(data []byte) error {
 	var s string
 	var num float64
+	var b bool
 	// To unmarshal correctly we need to pass pointers into the decoder.
 	var attempts = [...]Param{
 		{NumberT, &num},
+		{BooleanT, &b},
 		{StringT, &s},
 		{FuncParamT, &FuncParam{}},
 		{BlockFilterT, &BlockFilter{}},
@@ -293,6 +298,8 @@ func (p *Param) UnmarshalJSON(data []byte) error {
 				p.Value = int(*val)
 			case *string:
 				p.Value = *val
+			case *bool:
+				p.Value = *val
 			case *FuncParam:
 				p.Value = *val
 			case *BlockFilter:
diff --git a/pkg/rpc/request/txBuilder.go b/pkg/rpc/request/txBuilder.go
index 2edb4ad1f..e02ffbc77 100644
--- a/pkg/rpc/request/txBuilder.go
+++ b/pkg/rpc/request/txBuilder.go
@@ -114,6 +114,9 @@ func CreateFunctionInvocationScript(contract util.Uint160, method string, params
 				return nil, err
 			}
 			emit.String(script.BinWriter, strconv.Itoa(num))
+		case BooleanT:
+			val := params[i].GetBoolean()
+			emit.Bool(script.BinWriter, val)
 		case ArrayT:
 			slice, err := params[i].GetArray()
 			if err != nil {
diff --git a/pkg/rpc/request/tx_builder_test.go b/pkg/rpc/request/tx_builder_test.go
index b79b9d62e..ad445898d 100644
--- a/pkg/rpc/request/tx_builder_test.go
+++ b/pkg/rpc/request/tx_builder_test.go
@@ -26,6 +26,9 @@ func TestInvocationScriptCreationGood(t *testing.T) {
 	}, {
 		ps:     Params{{Type: NumberT, Value: 42}},
 		script: "1f0c0234320c146f459162ceeb248b071ec157d9e4f6fd26fdbe5041627d5b52",
+	}, {
+		ps:     Params{{Type: StringT, Value: "m"}, {Type: BooleanT, Value: true}},
+		script: "11db201f0c016d0c146f459162ceeb248b071ec157d9e4f6fd26fdbe5041627d5b52",
 	}, {
 		ps:     Params{{Type: StringT, Value: "a"}, {Type: ArrayT, Value: []Param{}}},
 		script: "10c01f0c01610c146f459162ceeb248b071ec157d9e4f6fd26fdbe5041627d5b52",
@@ -79,6 +82,7 @@ func TestInvocationScriptCreationBad(t *testing.T) {
 		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.PublicKeyType, Value: Param{Type: NumberT, Value: 42}}}}}},
 		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.PublicKeyType, Value: Param{Type: StringT, Value: "qwerty"}}}}}},
 		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.IntegerType, Value: Param{Type: StringT, Value: "qwerty"}}}}}},
+		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.IntegerType, Value: Param{Type: BooleanT, Value: true}}}}}},
 		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.BoolType, Value: Param{Type: NumberT, Value: 42}}}}}},
 		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.BoolType, Value: Param{Type: StringT, Value: "qwerty"}}}}}},
 		{{Type: ArrayT, Value: []Param{{Type: FuncParamT, Value: FuncParam{Type: smartcontract.UnknownType, Value: Param{}}}}}},