diff --git a/template.go b/template.go
index 9edaac7..6d64740 100644
--- a/template.go
+++ b/template.go
@@ -38,6 +38,7 @@ func NewTemplate(descs []*protokit.FileDescriptor) *Template {
 			Messages:      make(orderedMessages, 0, len(f.Messages)),
 			Services:      make(orderedServices, 0, len(f.Services)),
 			Options:       mergeOptions(extractOptions(f.GetOptions()), extensions.Transform(f.OptionExtensions)),
+			Syntax:        f.GetSyntax(),
 		}
 
 		for _, e := range f.Enums {
@@ -141,6 +142,8 @@ type File struct {
 	Services   orderedServices   `json:"services"`
 
 	Options map[string]interface{} `json:"options,omitempty"`
+
+	Syntax string `json:"syntax,omitempty"`
 }
 
 // Option returns the named option.
@@ -236,6 +239,8 @@ type MessageField struct {
 	DefaultValue string `json:"defaultValue"`
 
 	Options map[string]interface{} `json:"options,omitempty"`
+
+	Number int `json:"number,omitempty"`
 }
 
 // Option returns the named option.
@@ -482,6 +487,7 @@ func parseMessageField(pf *protokit.FieldDescriptor, oneofDecls []*descriptor.On
 		DefaultValue: pf.GetDefaultValue(),
 		Options:      mergeOptions(extractOptions(pf.GetOptions()), extensions.Transform(pf.OptionExtensions)),
 		IsOneof:      pf.OneofIndex != nil,
+		Number:       int(pf.GetNumber()),
 	}
 
 	if m.IsOneof {
diff --git a/template_test.go b/template_test.go
index 717919b..b2a67f7 100644
--- a/template_test.go
+++ b/template_test.go
@@ -138,6 +138,7 @@ func TestFileProperties(t *testing.T) {
 	require.True(t, bookingFile.HasServices)
 	require.NotEmpty(t, bookingFile.Options)
 	require.True(t, *bookingFile.Option(E_ExtendFile.Name).(*bool))
+	require.Equal(t, "", bookingFile.Syntax)
 }
 
 func TestFileEnumProperties(t *testing.T) {
@@ -254,6 +255,7 @@ func TestFieldProperties(t *testing.T) {
 	require.False(t, field.IsOneof)
 	require.NotEmpty(t, field.Options)
 	require.True(t, *field.Option(E_ExtendField.Name).(*bool))
+	require.Equal(t, 1, field.Number)
 
 	field = findField("status_code", msg)
 	require.Equal(t, "status_code", field.Name)
@@ -264,6 +266,7 @@ func TestFieldProperties(t *testing.T) {
 	require.Equal(t, "com.example.BookingStatus.StatusCode", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.False(t, field.IsOneof)
+	require.Equal(t, 3, field.Number)
 
 	field = findField("category", findMessage("Vehicle", vehicleFile))
 	require.Equal(t, "category", field.Name)
@@ -274,6 +277,7 @@ func TestFieldProperties(t *testing.T) {
 	require.Equal(t, "com.example.Vehicle.Category", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.False(t, field.IsOneof)
+	require.Equal(t, 5, field.Number)
 
 	field = findField("properties", findMessage("Vehicle", vehicleFile))
 	require.Equal(t, "properties", field.Name)
@@ -284,6 +288,7 @@ func TestFieldProperties(t *testing.T) {
 	require.Empty(t, field.DefaultValue)
 	require.True(t, field.IsMap)
 	require.False(t, field.IsOneof)
+	require.Equal(t, 7, field.Number)
 
 	field = findField("rates", findMessage("Vehicle", vehicleFile))
 	require.Equal(t, "rates", field.Name)
@@ -293,6 +298,7 @@ func TestFieldProperties(t *testing.T) {
 	require.Equal(t, "sint32", field.FullType)
 	require.False(t, field.IsMap)
 	require.False(t, field.IsOneof)
+	require.Equal(t, 6, field.Number)
 
 	field = findField("kilometers", findMessage("Vehicle", vehicleFile))
 	require.Equal(t, "kilometers", field.Name)
@@ -303,6 +309,7 @@ func TestFieldProperties(t *testing.T) {
 	require.False(t, field.IsMap)
 	require.True(t, field.IsOneof)
 	require.Equal(t, "travel", field.OneofDecl)
+	require.Equal(t, 8, field.Number)
 
 	field = findField("human_name", findMessage("Vehicle", vehicleFile))
 	require.Equal(t, "human_name", field.Name)
@@ -313,6 +320,7 @@ func TestFieldProperties(t *testing.T) {
 	require.False(t, field.IsMap)
 	require.True(t, field.IsOneof)
 	require.Equal(t, "drivers", field.OneofDecl)
+	require.Equal(t, 11, field.Number)
 }
 
 func TestFieldPropertiesProto3(t *testing.T) {
@@ -327,6 +335,7 @@ func TestFieldPropertiesProto3(t *testing.T) {
 	require.Equal(t, "string", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.Empty(t, field.Options)
+	require.Equal(t, 1, field.Number)
 
 	field = findField("model_code", msg)
 	require.Equal(t, "model_code", field.Name)
@@ -337,6 +346,7 @@ func TestFieldPropertiesProto3(t *testing.T) {
 	require.Equal(t, "string", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.Empty(t, field.Options)
+	require.Equal(t, 2, field.Number)
 
 	field = findField("daily_hire_rate_dollars", msg)
 	require.Equal(t, "daily_hire_rate_dollars", field.Name)
@@ -347,6 +357,7 @@ func TestFieldPropertiesProto3(t *testing.T) {
 	require.Equal(t, "sint32", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.Empty(t, field.Options)
+	require.Equal(t, 4, field.Number)
 }
 
 func TestFieldPropertiesProto3Optional(t *testing.T) {
@@ -361,6 +372,7 @@ func TestFieldPropertiesProto3Optional(t *testing.T) {
 	require.Equal(t, "string", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.Empty(t, field.Options)
+	require.Equal(t, 1, field.Number)
 
 	field = findField("name", msg)
 	require.Equal(t, "name", field.Name)
@@ -371,6 +383,7 @@ func TestFieldPropertiesProto3Optional(t *testing.T) {
 	require.Equal(t, "string", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.Empty(t, field.Options)
+	require.Equal(t, 2, field.Number)
 
 	field = findField("ingredients", msg)
 	require.Equal(t, "ingredients", field.Name)
@@ -381,6 +394,7 @@ func TestFieldPropertiesProto3Optional(t *testing.T) {
 	require.Equal(t, "string", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.Empty(t, field.Options)
+	require.Equal(t, 3, field.Number)
 }
 
 func TestServiceProperties(t *testing.T) {