diff --git a/cybozu/validate/options.pb.go b/cybozu/validate/options.pb.go
index bec38cc..7552d0c 100644
--- a/cybozu/validate/options.pb.go
+++ b/cybozu/validate/options.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.34.1
+// 	protoc-gen-go v1.34.2
 // 	protoc        (unknown)
 // source: cybozu/validate/options.proto
 
@@ -1606,7 +1606,7 @@ func file_cybozu_validate_options_proto_rawDescGZIP() []byte {
 
 var file_cybozu_validate_options_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
 var file_cybozu_validate_options_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
-var file_cybozu_validate_options_proto_goTypes = []interface{}{
+var file_cybozu_validate_options_proto_goTypes = []any{
 	(StringRules_UnicodeNormalizationForm)(0), // 0: cybozu.validate.StringRules.UnicodeNormalizationForm
 	(*FieldRules)(nil),                        // 1: cybozu.validate.FieldRules
 	(*ItemsRules)(nil),                        // 2: cybozu.validate.ItemsRules
@@ -1663,7 +1663,7 @@ func file_cybozu_validate_options_proto_init() {
 		return
 	}
 	if !protoimpl.UnsafeEnabled {
-		file_cybozu_validate_options_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[0].Exporter = func(v any, i int) any {
 			switch v := v.(*FieldRules); i {
 			case 0:
 				return &v.state
@@ -1675,7 +1675,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[1].Exporter = func(v any, i int) any {
 			switch v := v.(*ItemsRules); i {
 			case 0:
 				return &v.state
@@ -1687,7 +1687,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[2].Exporter = func(v any, i int) any {
 			switch v := v.(*FloatRules); i {
 			case 0:
 				return &v.state
@@ -1699,7 +1699,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[3].Exporter = func(v any, i int) any {
 			switch v := v.(*DoubleRules); i {
 			case 0:
 				return &v.state
@@ -1711,7 +1711,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[4].Exporter = func(v any, i int) any {
 			switch v := v.(*Int32Rules); i {
 			case 0:
 				return &v.state
@@ -1723,7 +1723,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[5].Exporter = func(v any, i int) any {
 			switch v := v.(*Int64Rules); i {
 			case 0:
 				return &v.state
@@ -1735,7 +1735,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[6].Exporter = func(v any, i int) any {
 			switch v := v.(*Uint32Rules); i {
 			case 0:
 				return &v.state
@@ -1747,7 +1747,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[7].Exporter = func(v any, i int) any {
 			switch v := v.(*Uint64Rules); i {
 			case 0:
 				return &v.state
@@ -1759,7 +1759,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[8].Exporter = func(v any, i int) any {
 			switch v := v.(*BoolRules); i {
 			case 0:
 				return &v.state
@@ -1771,7 +1771,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[9].Exporter = func(v any, i int) any {
 			switch v := v.(*StringRules); i {
 			case 0:
 				return &v.state
@@ -1783,7 +1783,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[10].Exporter = func(v any, i int) any {
 			switch v := v.(*BytesRules); i {
 			case 0:
 				return &v.state
@@ -1795,7 +1795,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[11].Exporter = func(v any, i int) any {
 			switch v := v.(*EnumRules); i {
 			case 0:
 				return &v.state
@@ -1807,7 +1807,7 @@ func file_cybozu_validate_options_proto_init() {
 				return nil
 			}
 		}
-		file_cybozu_validate_options_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
+		file_cybozu_validate_options_proto_msgTypes[12].Exporter = func(v any, i int) any {
 			switch v := v.(*MessageRules); i {
 			case 0:
 				return &v.state
@@ -1820,7 +1820,7 @@ func file_cybozu_validate_options_proto_init() {
 			}
 		}
 	}
-	file_cybozu_validate_options_proto_msgTypes[0].OneofWrappers = []interface{}{
+	file_cybozu_validate_options_proto_msgTypes[0].OneofWrappers = []any{
 		(*FieldRules_Float)(nil),
 		(*FieldRules_Double)(nil),
 		(*FieldRules_Int32)(nil),
@@ -1841,19 +1841,19 @@ func file_cybozu_validate_options_proto_init() {
 		(*FieldRules_Repeated)(nil),
 		(*FieldRules_Map)(nil),
 	}
-	file_cybozu_validate_options_proto_msgTypes[1].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[2].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[3].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[4].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[5].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[6].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[7].OneofWrappers = []interface{}{}
-	file_cybozu_validate_options_proto_msgTypes[9].OneofWrappers = []interface{}{
+	file_cybozu_validate_options_proto_msgTypes[1].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[2].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[3].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[4].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[5].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[6].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[7].OneofWrappers = []any{}
+	file_cybozu_validate_options_proto_msgTypes[9].OneofWrappers = []any{
 		(*StringRules_Email)(nil),
 		(*StringRules_Uri)(nil),
 		(*StringRules_E164)(nil),
 	}
-	file_cybozu_validate_options_proto_msgTypes[10].OneofWrappers = []interface{}{}
+	file_cybozu_validate_options_proto_msgTypes[10].OneofWrappers = []any{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
diff --git a/examples/validation.pb.go b/examples/validation.pb.go
index a185083..018f903 100644
--- a/examples/validation.pb.go
+++ b/examples/validation.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.34.1
+// 	protoc-gen-go v1.34.2
 // 	protoc        (unknown)
 // source: examples/validation.proto
 
@@ -1310,7 +1310,7 @@ func file_examples_validation_proto_rawDescGZIP() []byte {
 
 var file_examples_validation_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
 var file_examples_validation_proto_msgTypes = make([]protoimpl.MessageInfo, 15)
-var file_examples_validation_proto_goTypes = []interface{}{
+var file_examples_validation_proto_goTypes = []any{
 	(Enums_Enum)(0),               // 0: examples.Enums.Enum
 	(*Ignored)(nil),               // 1: examples.Ignored
 	(*Scalars)(nil),               // 2: examples.Scalars
@@ -1359,7 +1359,7 @@ func file_examples_validation_proto_init() {
 		return
 	}
 	if !protoimpl.UnsafeEnabled {
-		file_examples_validation_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[0].Exporter = func(v any, i int) any {
 			switch v := v.(*Ignored); i {
 			case 0:
 				return &v.state
@@ -1371,7 +1371,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[1].Exporter = func(v any, i int) any {
 			switch v := v.(*Scalars); i {
 			case 0:
 				return &v.state
@@ -1383,7 +1383,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[2].Exporter = func(v any, i int) any {
 			switch v := v.(*OptionalScalars); i {
 			case 0:
 				return &v.state
@@ -1395,7 +1395,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[3].Exporter = func(v any, i int) any {
 			switch v := v.(*RepeatedScalars); i {
 			case 0:
 				return &v.state
@@ -1407,7 +1407,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[4].Exporter = func(v any, i int) any {
 			switch v := v.(*Strings); i {
 			case 0:
 				return &v.state
@@ -1419,7 +1419,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[5].Exporter = func(v any, i int) any {
 			switch v := v.(*Maps); i {
 			case 0:
 				return &v.state
@@ -1431,7 +1431,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[6].Exporter = func(v any, i int) any {
 			switch v := v.(*Enums); i {
 			case 0:
 				return &v.state
@@ -1443,7 +1443,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[7].Exporter = func(v any, i int) any {
 			switch v := v.(*Oneofs); i {
 			case 0:
 				return &v.state
@@ -1455,7 +1455,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[8].Exporter = func(v any, i int) any {
 			switch v := v.(*Composed); i {
 			case 0:
 				return &v.state
@@ -1467,7 +1467,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[9].Exporter = func(v any, i int) any {
 			switch v := v.(*Nested); i {
 			case 0:
 				return &v.state
@@ -1479,7 +1479,7 @@ func file_examples_validation_proto_init() {
 				return nil
 			}
 		}
-		file_examples_validation_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
+		file_examples_validation_proto_msgTypes[14].Exporter = func(v any, i int) any {
 			switch v := v.(*Nested_Inner); i {
 			case 0:
 				return &v.state
@@ -1492,9 +1492,9 @@ func file_examples_validation_proto_init() {
 			}
 		}
 	}
-	file_examples_validation_proto_msgTypes[2].OneofWrappers = []interface{}{}
-	file_examples_validation_proto_msgTypes[6].OneofWrappers = []interface{}{}
-	file_examples_validation_proto_msgTypes[7].OneofWrappers = []interface{}{
+	file_examples_validation_proto_msgTypes[2].OneofWrappers = []any{}
+	file_examples_validation_proto_msgTypes[6].OneofWrappers = []any{}
+	file_examples_validation_proto_msgTypes[7].OneofWrappers = []any{
 		(*Oneofs_Int32)(nil),
 		(*Oneofs_String_)(nil),
 		(*Oneofs_Ts)(nil),