diff --git a/internal/driver/calendar/service.go b/internal/driver/calendar/service.go
index ea35f26..9a24c0f 100644
--- a/internal/driver/calendar/service.go
+++ b/internal/driver/calendar/service.go
@@ -16,10 +16,6 @@ import (
 	"google.golang.org/api/option"
 )
 
-type Client interface {
-	Create(calendarId, name, description string, from, to time.Time) error
-}
-
 type GoogleClient struct {
 	calIds map[string]struct{}
 	*calendar.Service
diff --git a/internal/driver/pdf/service.go b/internal/driver/pdf/service.go
index bf7163e..b24a230 100644
--- a/internal/driver/pdf/service.go
+++ b/internal/driver/pdf/service.go
@@ -11,11 +11,6 @@ import (
 	"github.com/labstack/gommon/log"
 )
 
-type Client interface {
-	BuildInvoice(context map[string]any) error
-	BuildReport(context map[string]any, period string, month, year int) error
-}
-
 type PdfClient struct {
 	path      string
 	invoiceId string
diff --git a/internal/service/booking/service.go b/internal/service/booking/service.go
index de41534..3fafdc2 100644
--- a/internal/service/booking/service.go
+++ b/internal/service/booking/service.go
@@ -5,8 +5,6 @@ import (
 	"time"
 
 	"github.com/rjNemo/rentease/internal/config"
-	"github.com/rjNemo/rentease/internal/driver/calendar"
-	"github.com/rjNemo/rentease/internal/driver/pdf"
 )
 
 type Store interface {
@@ -26,6 +24,15 @@ type Store interface {
 	UpdateItem(id int, item string, paymentMethod string, paymentStatus string, qty int, price float64) (*Item, error)
 }
 
+type PdfClient interface {
+	BuildInvoice(context map[string]any) error
+	BuildReport(context map[string]any, period string, month, year int) error
+}
+
+type CalendarClient interface {
+	Create(calendarId, name, description string, from, to time.Time) error
+}
+
 type parserClient interface {
 	Parse(rawContent string) (*Booking, error)
 }
@@ -33,11 +40,11 @@ type parserClient interface {
 type Service struct {
 	store    Store
 	parser   parserClient
-	calendar calendar.Client
-	pdf      pdf.Client
+	calendar CalendarClient
+	pdf      PdfClient
 }
 
-func NewService(store Store, parser parserClient, calendar calendar.Client, pdf pdf.Client) (*Service, error) {
+func NewService(store Store, parser parserClient, calendar CalendarClient, pdf PdfClient) (*Service, error) {
 	return &Service{
 		store:    store,
 		parser:   parser,