diff --git a/cloudflare/cache/client.go b/cloudflare/cache/client.go
index fb3b9b5..a370732 100644
--- a/cloudflare/cache/client.go
+++ b/cloudflare/cache/client.go
@@ -6,7 +6,7 @@ import (
 	"github.com/syumai/workers/internal/jsutil"
 )
 
-var cache = jsutil.Global.Get("caches")
+var cache = js.Global().Get("caches")
 
 // Cache
 type Cache struct {
diff --git a/cloudflare/cron/cron.go b/cloudflare/cron/cron.go
index a3cd47b..fb97360 100644
--- a/cloudflare/cron/cron.go
+++ b/cloudflare/cron/cron.go
@@ -37,7 +37,7 @@ var scheduledTask Task
 // ScheduleTask sets the Task to be executed
 func ScheduleTask(task Task) {
 	scheduledTask = task
-	jsutil.Global.Call("ready")
+	js.Global().Call("ready")
 	select {}
 }
 
@@ -78,5 +78,5 @@ func init() {
 
 		return jsutil.NewPromise(cb)
 	})
-	jsutil.Global.Set("runScheduler", runSchedulerCallback)
+	js.Global().Set("runScheduler", runSchedulerCallback)
 }
diff --git a/cloudflare/fetch/client.go b/cloudflare/fetch/client.go
index 6040fab..851758e 100644
--- a/cloudflare/fetch/client.go
+++ b/cloudflare/fetch/client.go
@@ -3,8 +3,6 @@ package fetch
 import (
 	"net/http"
 	"syscall/js"
-
-	"github.com/syumai/workers/internal/jsutil"
 )
 
 // Client is an HTTP client.
@@ -44,7 +42,7 @@ func WithBinding(bind js.Value) ClientOption {
 // NewClient returns new Client
 func NewClient(opts ...ClientOption) *Client {
 	c := &Client{
-		namespace: jsutil.Global,
+		namespace: js.Global(),
 	}
 	c.applyOptions(opts)
 
diff --git a/cloudflare/kv.go b/cloudflare/kv.go
index 9cb6665..f5c830e 100644
--- a/cloudflare/kv.go
+++ b/cloudflare/kv.go
@@ -7,7 +7,6 @@ import (
 	"syscall/js"
 
 	"github.com/syumai/workers/cloudflare/internal/cfruntimecontext"
-
 	"github.com/syumai/workers/internal/jsutil"
 )
 
@@ -67,7 +66,7 @@ func (kv *KVNamespace) GetReader(key string, opts *KVNamespaceGetOptions) (io.Re
 	if err != nil {
 		return nil, err
 	}
-	jsutil.Global.Get("console").Call("log", v)
+	js.Global().Get("console").Call("log", v)
 	return jsutil.ConvertStreamReaderToReader(v.Call("getReader")), nil
 }
 
diff --git a/handler.go b/handler.go
index 4fc296e..313ba47 100644
--- a/handler.go
+++ b/handler.go
@@ -40,7 +40,7 @@ func init() {
 		})
 		return jsutil.NewPromise(cb)
 	})
-	jsutil.Global.Set("handleRequest", handleRequestCallback)
+	js.Global().Set("handleRequest", handleRequestCallback)
 }
 
 // handleRequest accepts a Request object and returns Response object.
@@ -78,6 +78,6 @@ func Serve(handler http.Handler) {
 		handler = http.DefaultServeMux
 	}
 	httpHandler = handler
-	jsutil.Global.Call("ready")
+	js.Global().Call("ready")
 	select {}
 }
diff --git a/internal/jsutil/jsutil.go b/internal/jsutil/jsutil.go
index ef315b3..0e2f331 100644
--- a/internal/jsutil/jsutil.go
+++ b/internal/jsutil/jsutil.go
@@ -7,17 +7,16 @@ import (
 )
 
 var (
-	Global              = js.Global()
-	ObjectClass         = Global.Get("Object")
-	PromiseClass        = Global.Get("Promise")
-	RequestClass        = Global.Get("Request")
-	ResponseClass       = Global.Get("Response")
-	HeadersClass        = Global.Get("Headers")
-	ArrayClass          = Global.Get("Array")
-	Uint8ArrayClass     = Global.Get("Uint8Array")
-	ErrorClass          = Global.Get("Error")
-	ReadableStreamClass = Global.Get("ReadableStream")
-	DateClass           = Global.Get("Date")
+	ObjectClass         = js.Global().Get("Object")
+	PromiseClass        = js.Global().Get("Promise")
+	RequestClass        = js.Global().Get("Request")
+	ResponseClass       = js.Global().Get("Response")
+	HeadersClass        = js.Global().Get("Headers")
+	ArrayClass          = js.Global().Get("Array")
+	Uint8ArrayClass     = js.Global().Get("Uint8Array")
+	ErrorClass          = js.Global().Get("Error")
+	ReadableStreamClass = js.Global().Get("ReadableStream")
+	DateClass           = js.Global().Get("Date")
 	Null                = js.ValueOf(nil)
 )