diff --git a/config/clients/go/template/api_test.mustache b/config/clients/go/template/api_test.mustache
index 850f8d56..5213bca1 100644
--- a/config/clients/go/template/api_test.mustache
+++ b/config/clients/go/template/api_test.mustache
@@ -792,7 +792,7 @@ func Test{{appShortName}}Api(t *testing.T) {
 		got, response, err := apiClient.{{appShortName}}Api.ReadChanges(context.Background(), "01GXSB9YR785C4FYS3C0RTG7B2").
 			Type_("repo").
 			PageSize(25).
-			StartTime("2022-01-01T00:00:00Z").
+			StartTime(time.Parse(time.RFC3339, "2022-01-01T00:00:00Z")).
 			ContinuationToken("eyJwayI6IkxBVEVTVF9OU0NPTkZJR19hdXRoMHN0b3JlIiwic2siOiIxem1qbXF3MWZLZExTcUoyN01MdTdqTjh0cWgifQ==").
 			Execute()
 		if err != nil {
diff --git a/config/clients/go/template/client/client.mustache b/config/clients/go/template/client/client.mustache
index 203ce42b..a12a9355 100644
--- a/config/clients/go/template/client/client.mustache
+++ b/config/clients/go/template/client/client.mustache
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"math"
 	_nethttp "net/http"
+	"time"
 
 	fgaSdk "{{gitHost}}/{{gitUserId}}/{{gitRepoId}}"
 	"{{gitHost}}/{{gitUserId}}/{{gitRepoId}}/credentials"
@@ -1125,6 +1126,7 @@ type SdkClientReadChangesRequestInterface interface {
 
 type ClientReadChangesRequest struct {
 	Type string `json:"type,omitempty"`
+	StartTime time.Time `json:"start_time,omitempty"`
 }
 
 type ClientReadChangesOptions struct {
diff --git a/config/clients/go/template/client/client_test.mustache b/config/clients/go/template/client/client_test.mustache
index efffff22..e22f3b9a 100644
--- a/config/clients/go/template/client/client_test.mustache
+++ b/config/clients/go/template/client/client_test.mustache
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"testing"
+	"time"
 
 	"github.com/jarcoal/httpmock"
 	"{{gitHost}}/{{gitUserId}}/{{gitRepoId}}"
@@ -1040,8 +1041,9 @@ func Test{{appShortName}}Client(t *testing.T) {
 		)
 		body := ClientReadChangesRequest{
 			Type: "document",
+			StartTime: time.Parse(time.RFC3339,"2022-01-01T00:00:00Z"),
 		}
-		options := ClientReadChangesOptions{ContinuationToken: {{packageName}}.PtrString("eyJwayI6IkxBVEVTVF9OU0NPTkZJR19hdXRoMHN0b3JlIiwic2siOiIxem1qbXF3MWZLZExTcUoyN01MdTdqTjh0cWgifQ=="), StartTime: {{packageName}}.PtrString("2022-01-01T00:00:00Z"), PageSize: {{packageName}}.PtrInt32(25)}
+		options := ClientReadChangesOptions{ContinuationToken: {{packageName}}.PtrString("eyJwayI6IkxBVEVTVF9OU0NPTkZJR19hdXRoMHN0b3JlIiwic2siOiIxem1qbXF3MWZLZExTcUoyN01MdTdqTjh0cWgifQ=="), PageSize: {{packageName}}.PtrInt32(25)}
 		got, err := fgaClient.ReadChanges(context.Background()).Body(body).Options(options).Execute()
 		if err != nil {
 			t.Fatalf("%v", err)