diff --git a/ledger/alonzo/genesis.go b/ledger/alonzo/genesis.go
index c597c353..cb480b66 100644
--- a/ledger/alonzo/genesis.go
+++ b/ledger/alonzo/genesis.go
@@ -66,10 +66,10 @@ func (g *AlonzoGenesis) NormalizeCostModels() error {
 }
 
 func (c *CostModel) UnmarshalJSON(data []byte) error {
-	tmpMap := make(map[string]interface{})
+	tmpMap := make(map[string]any)
 	if err := json.Unmarshal(data, &tmpMap); err != nil {
 		// Try to unmarshal as array first
-		var tmpArray []interface{}
+		var tmpArray []any
 		if arrayErr := json.Unmarshal(data, &tmpArray); arrayErr == nil {
 			*c = make(CostModel)
 			for i, v := range tmpArray {
@@ -95,7 +95,7 @@ func (c *CostModel) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-func toInt(v interface{}) (int, error) {
+func toInt(v any) (int, error) {
 	switch val := v.(type) {
 	case float64:
 		if val > float64(math.MaxInt) || val < float64(math.MinInt) {
diff --git a/ledger/alonzo/pparams_test.go b/ledger/alonzo/pparams_test.go
index ca94da63..96d41a2c 100644
--- a/ledger/alonzo/pparams_test.go
+++ b/ledger/alonzo/pparams_test.go
@@ -224,7 +224,7 @@ func TestCostModelArrayFormat(t *testing.T) {
 }
 
 func TestScientificNotationInCostModels(t *testing.T) {
-	costModel := map[string]interface{}{
+	costModel := map[string]any{
 		"0": 2.477736e+06, // Changed from param1 to 0
 		"1": 1.5e6,        // Changed from param2 to 1
 		"2": 1000000,      // Changed from param3 to 2
@@ -442,7 +442,7 @@ func TestAlonzoUtxorpc(t *testing.T) {
 	}
 }
 
-func toJSON(v interface{}) string {
+func toJSON(v any) string {
 	b, err := json.Marshal(v)
 	if err != nil {
 		panic(fmt.Sprintf("failed to marshal JSON: %v", err))