diff --git a/gh-pages/docs/apis/pjax/config/index.md b/gh-pages/docs/apis/pjax/config/index.md
index bccdd63d..4d2f9f4e 100644
--- a/gh-pages/docs/apis/pjax/config/index.md
+++ b/gh-pages/docs/apis/pjax/config/index.md
@@ -65,7 +65,7 @@ Set a dictionary object having has/get/set/delete methods of Map to pass the doc
 
 ## fetch: {...} = ...
 
-### rewrite: (url: string, method: string, headers: Headers, timeout: number, body: FormData | null) => XMLHttpRequest | undefined
+### rewrite?: (url: string, method: string, headers: Headers, timeout: number, body: FormData | null) => XMLHttpRequest | undefined
 
 Rewrite the XHR object, or replace it with another or fake.
 
@@ -79,7 +79,7 @@ Wait for the specified milliseconds after sending a request.
 
 ## update: {...} = ...
 
-### rewrite: (url: string, document: Document, area: string, cache?: Document) => void = `() => undefined`
+### rewrite?: (url: string, document: Document, area: string, cache?: Document) => void
 
 Rewrite the source document object.
 If you use the sequence option, you should use only it instead of this.
diff --git a/src/layer/domain/data/config.test.ts b/src/layer/domain/data/config.test.ts
index 4387e2bd..7ef47afa 100644
--- a/src/layer/domain/data/config.test.ts
+++ b/src/layer/domain/data/config.test.ts
@@ -18,7 +18,7 @@ describe('Unit: layer/domain/data/config', () => {
     it('ignore', () => {
       assert(new Config({}).update.ignore === '[href^="chrome-extension://"],[src*=".scr.kaspersky-labs.com/"]');
       assert(new Config(new Config({})).update.ignore === '[href^="chrome-extension://"],[src*=".scr.kaspersky-labs.com/"]');
-      assert(new Config({ update: { ignore: 'style' } }).update.ignore === '[href^="chrome-extension://"],[src*=".scr.kaspersky-labs.com/"],style');
+      assert(new Config({ update: { ignore: 'style' } }).update.ignore === 'style,[href^="chrome-extension://"],[src*=".scr.kaspersky-labs.com/"]');
     });
 
   });
diff --git a/src/layer/domain/data/config.ts b/src/layer/domain/data/config.ts
index 18170694..005af77a 100644
--- a/src/layer/domain/data/config.ts
+++ b/src/layer/domain/data/config.ts
@@ -8,26 +8,16 @@ export { scope } from './config/scope';
 
 export class Config implements Option {
   constructor(option: Option) {
-    Object.defineProperties(this.update, {
-      ignore: {
-        enumerable: false,
-        set(this: Config['update'], value: string) {
-          this.ignores['_'] = value;
-        },
-        get(this: Config['update']): string {
-          return Object.keys(this.ignores)
-            .map(i => this.ignores[i])
-            .filter(s => s.trim().length > 0)
-            .join(',');
-        },
-      },
-    });
     extend<Option>(this, option);
+    this.update.ignores.$ ??= option.update?.ignore ?? '';
+    this.update.ignore = Object.values(this.update.ignores).filter(s => s).join(',');
     overwrite(this.scope, option?.scope ?? {});
     this.fetch.headers = new Headers(this.fetch.headers);
-    Object.freeze(this);
     this.fetch.headers.set('X-Requested-With', 'XMLHttpRequest');
     this.fetch.headers.set('X-Pjax', '1');
+    Object.freeze(this);
+    Object.freeze(this.fetch);
+    Object.freeze(this.update);
   }
   public readonly areas = ['body'];
   public readonly link = ':is(a, area)[href]:not([target])';
@@ -54,12 +44,13 @@ export class Config implements Option {
     wait: 0,
   };
   public readonly update = {
-    rewrite: (_url: string, _document: Document, _area: string, _cache: Document | undefined): void => undefined,
+    rewrite: undefined as NonNullable<Option['update']>['rewrite'],
     head: 'base, meta, link',
     css: true,
     script: true,
     ignore: '',
     ignores: {
+      $: undefined as string | undefined,
       extension: '[href^="chrome-extension://"]',
       security: '[src*=".scr.kaspersky-labs.com/"]',
     },
diff --git a/src/layer/domain/router/module/update.ts b/src/layer/domain/router/module/update.ts
index 22967fd4..a769f602 100644
--- a/src/layer/domain/router/module/update.ts
+++ b/src/layer/domain/router/module/update.ts
@@ -53,7 +53,7 @@ export function update(
         const memory = event.type === RouterEventType.Popstate
           ? config.memory?.get(event.location.dest.path)
           : undefined;
-        config.update.rewrite(
+        config.update.rewrite?.(
           event.location.dest.href,
           documents.src,
           area,