diff --git a/base.ts b/base.ts
index b78698a..7a0b51f 100644
--- a/base.ts
+++ b/base.ts
@@ -14,11 +14,11 @@ export interface Page {
   /** the thumbnail URL of a page if exists
    *
    * set to `null` if not exists
-  */
+   */
   image: string | null;
   /** the thumbnail text of a page.
-  * the maximum number of lines is 5.
-  * */ descriptions: string[];
+   * the maximum number of lines is 5.
+   */ descriptions: string[];
   /** ページの最終更新日時 */ updated: number;
   /** Date last visitedに使われる最終アクセス日時 */ accessed: number;
 }
diff --git a/deps/events.ts b/deps/events.ts
index 94f12cc..23acfb2 100644
--- a/deps/events.ts
+++ b/deps/events.ts
@@ -1 +1 @@
-export type { EventEmitter } from "https://deno.land/std@0.131.0/node/events.ts";
+export type { EventEmitter } from "https://deno.land/std@0.131.0/node/_events.d.ts";
diff --git a/deps/react.ts b/deps/react.ts
index 06095b7..4994920 100644
--- a/deps/react.ts
+++ b/deps/react.ts
@@ -1 +1,72 @@
-export type { default as React } from "https://esm.sh/react@17.0.2";
+/// <reference no-default-lib="true"/>
+/// <reference lib="esnext"/>
+/// <reference lib="dom"/>
+
+// cut and modified from https://cdn.esm.sh/v73/@types/react@17.0.42/index.d.ts
+
+type NativeMouseEvent = MouseEvent;
+
+// deno-lint-ignore no-namespace
+export namespace React {
+  /**
+   * currentTarget - a reference to the element on which the event listener is registered.
+   *
+   * target - a reference to the element from which the event was originally dispatched.
+   * This might be a child element to the element on which the event listener is registered.
+   * If you thought this should be `EventTarget & T`, see https://github.com/DefinitelyTyped/DefinitelyTyped/issues/11508#issuecomment-256045682
+   */
+  export interface SyntheticEvent<
+    T extends Element = Element,
+    E extends Event = Event,
+  > {
+    nativeEvent: E;
+    currentTarget: T & EventTarget;
+    target: EventTarget;
+    bubbles: boolean;
+    cancelable: boolean;
+    defaultPrevented: boolean;
+    eventPhase: number;
+    isTrusted: boolean;
+    preventDefault(): void;
+    isDefaultPrevented(): boolean;
+    stopPropagation(): void;
+    isPropagationStopped(): boolean;
+    persist(): void;
+    timeStamp: number;
+    type: string;
+  }
+  export interface AbstractView {
+    styleMedia: StyleMedia;
+    document: Document;
+  }
+
+  export interface UIEvent<T extends Element = Element, E extends Event = Event>
+    extends SyntheticEvent<T, E> {
+    detail: number;
+    view: AbstractView;
+  }
+  export interface MouseEvent<
+    T extends Element = Element,
+    E extends Event = NativeMouseEvent,
+  > extends UIEvent<T, E> {
+    altKey: boolean;
+    button: number;
+    buttons: number;
+    clientX: number;
+    clientY: number;
+    ctrlKey: boolean;
+    /**
+     * See [DOM Level 3 Events spec](https://www.w3.org/TR/uievents-key/#keys-modifier). for a list of valid (case-sensitive) arguments to this method.
+     */
+    getModifierState(key: string): boolean;
+    metaKey: boolean;
+    movementX: number;
+    movementY: number;
+    pageX: number;
+    pageY: number;
+    relatedTarget: EventTarget | null;
+    screenX: number;
+    screenY: number;
+    shiftKey: boolean;
+  }
+}
diff --git a/userscript.ts b/userscript.ts
index 2519832..ecbf4a0 100644
--- a/userscript.ts
+++ b/userscript.ts
@@ -1,3 +1,8 @@
+/// <reference no-default-lib="true"/>
+/// <reference lib="esnext"/>
+/// <reference lib="dom"/>
+/// <reference lib="deno.ns" />
+
 import { ParsedLine } from "./userscript/blocks.ts";
 import { StringLc } from "./base.ts";
 import type { Layout, PartialLayout } from "./layout.ts";