diff --git a/types/poi/index.d.ts b/types/poi/index.d.ts
index f5087075cc..f8e346ed9f 100644
--- a/types/poi/index.d.ts
+++ b/types/poi/index.d.ts
@@ -10,192 +10,22 @@ import { Options as HtmlWebpackPluginOptions } from "html-webpack-plugin";
 import * as WebpackChainConfig from "webpack-chain";
 import CAC from "cac/types/CAC";
 
-export type Mode = "production" | "development" | "test";
-
-export interface Opts {
-    type: string;
-    mode: Mode;
-    [k: string]: any;
-}
-
-/**
- * https://poi.js.org/config.html
- */
-export interface Config {
-    entry?: Config.Entry;
-    output?: Config.Output;
-    pages?: Config.Pages;
-    babel?: Config.Babel;
-    css?: Config.Css;
-    assets?: Config.Assets;
-    envs?: Config.Envs;
-    constants?: Config.Constants;
-    chainWebpack?: Config.ChainWebpack;
-    configureWebpack?: Config.ConfigureWebpack;
-    publicFolder?: Config.PublicFolder;
-    devServer?: Config.DevServer;
-    plugins?: Config.Plugins;
-}
-
-export namespace Config {
-    type Entry = WebpackConfig["entry"];
-
-    interface Output {
-        dir?: string;
-        clean?: boolean;
-        format?: "iife" | "cjs" | "umd";
-        moduleName?: string;
-        sourceMap?: boolean;
-        minimize?: boolean;
-        publicUrl?: string;
-        fileNames?: Output.FileNames;
-        target?:
-            | "web"
-            | "electron"
-            | "electron-renderer"
-            | "electron-main"
-            | "node"
-            | "node-webkit"
-            | "async-node"
-            | "webworker";
-        html?: Output.Html;
-    }
-    namespace Output {
-        interface FileNames {
-            js?: string;
-            css?: string;
-            font?: string;
-            image?: string;
-        }
-
-        interface HtmlOptions {
-            title?: string;
-            filename?: string;
-            template?: string;
-            inject?: boolean;
-        }
-
-        type Html = boolean | HtmlOptions;
-    }
-
-    interface Pages {
-        [pageName: string]:
-            | string
-            | Partial<HtmlWebpackPluginOptions> & {
-                  entry: string;
-                  chunks?: string[];
-              };
-    }
-
-    interface Babel {
-        jsx?: string;
-        transpileModules?: string | string[];
-        namedImports?: string | Babel.NamedImportsOptions;
-    }
-    namespace Babel {
-        interface NamedImportsOptions {
-            [fileExt: string]: {
-                [ComponentName: string]: string;
-            };
-        }
-    }
-
-    interface Css {
-        extract?: boolean;
-        sourceMap?: boolean;
-        loaderOptions?: Css.LoaderOptions;
-    }
-    namespace Css {
-        interface LoaderOptions {
-            css?: any;
-            sass?: any;
-            postcss?: any;
-            less?: any;
-            stylus?: any;
-        }
-    }
-
-    interface Assets {
-        inlineImageMaxSize?: number;
-    }
-
-    interface Envs {
-        [envName: string]: string;
-    }
-
-    interface Constants {
-        [constantName: string]: string;
-    }
-
-    interface ChainWebpack {
-        (config: WebpackChainConfig, opts: Opts): void;
-    }
-
-    type ConfigureWebpack =
-        | WebpackConfig
-        | ((config: WebpackConfig, opts: Opts) => void | WebpackConfig);
-
-    type PublicFolder = string | boolean;
-
-    interface DevServer {
-        host?: string;
-        port?: string | number;
-        hot?: boolean;
-        hotOnly?: boolean;
-        hotEntries?: string[];
-        historyApiFallback?: WebpackDevServerConfig["historyApiFallback"];
-        open?: boolean;
-        proxy?: string | WebpackDevServerConfig["proxy"];
-        https?: WebpackDevServerConfig["https"];
-        before?: WebpackDevServerConfig["before"];
-        after?: WebpackDevServerConfig["after"];
-        headers?: WebpackDevServerConfig["headers"];
-    }
-
-    interface PluginOption {
-        resolve: string;
-        options?: any;
-    }
-    type Plugins = Array<string | PluginOption>;
-}
-
-export interface ConfigLoader {
-    resolve(
-        files?: ReadonlyArray<string>,
-        cwd?: string,
-        stopDir?: string
-    ): string | null;
-    resolve(options?: ConfigLoader.Options): string | null;
-
-    load(files?: ReadonlyArray<string>, cwd?: string, stopDir?: string): any;
-    load(options?: ConfigLoader.Options): any;
-}
-export namespace ConfigLoader {
-    interface Options {
-        files?: string[];
-        cwd?: string;
-        stopDir?: string;
-        packageKey?: string;
-        parseJSON?: (str: string) => any;
-    }
-}
-
 /**
  * https://poi.js.org/api.html#constructor-argv
  */
-export class Poi {
-    mode: Mode;
+declare class PoiCore {
+    mode: PoiCore.Mode;
 
     cli: CAC;
 
     /** The current running command */
     command: CAC["command"];
 
-    config: Config;
+    config: PoiCore.Config;
 
     isProd: boolean;
 
-    configLoader: ConfigLoader;
+    configLoader: PoiCore.ConfigLoader;
 
     constructor(argv?: string[]);
 
@@ -204,7 +34,7 @@ export class Poi {
 
     hasPlugin(name: string): boolean;
 
-    hook(hookName: string, handler: Poi.HookHandler): void;
+    hook(hookName: string, handler: PoiCore.HookHandler): void;
 
     resolveCwd(...args: string[]): string;
 
@@ -230,8 +60,184 @@ export class Poi {
     localRequire(pkg: string, cwd?: string): any;
 }
 
-export namespace Poi {
+declare namespace PoiCore {
+    type Mode = "production" | "development" | "test";
+
+    interface Opts {
+        type: string;
+        mode: Mode;
+        [k: string]: any;
+    }
+
+    /**
+     * https://poi.js.org/config.html
+     */
+    interface Config {
+        entry?: Config.Entry;
+        output?: Config.Output;
+        pages?: Config.Pages;
+        babel?: Config.Babel;
+        css?: Config.Css;
+        assets?: Config.Assets;
+        envs?: Config.Envs;
+        constants?: Config.Constants;
+        chainWebpack?: Config.ChainWebpack;
+        configureWebpack?: Config.ConfigureWebpack;
+        publicFolder?: Config.PublicFolder;
+        devServer?: Config.DevServer;
+        plugins?: Config.Plugins;
+    }
+
+    namespace Config {
+        type Entry = WebpackConfig["entry"];
+
+        interface Output {
+            dir?: string;
+            clean?: boolean;
+            format?: "iife" | "cjs" | "umd";
+            moduleName?: string;
+            sourceMap?: boolean;
+            minimize?: boolean;
+            publicUrl?: string;
+            fileNames?: Output.FileNames;
+            target?:
+                | "web"
+                | "electron"
+                | "electron-renderer"
+                | "electron-main"
+                | "node"
+                | "node-webkit"
+                | "async-node"
+                | "webworker";
+            html?: Output.Html;
+        }
+        namespace Output {
+            interface FileNames {
+                js?: string;
+                css?: string;
+                font?: string;
+                image?: string;
+            }
+
+            interface HtmlOptions {
+                title?: string;
+                filename?: string;
+                template?: string;
+                inject?: boolean;
+            }
+
+            type Html = boolean | HtmlOptions;
+        }
+
+        interface Pages {
+            [pageName: string]:
+                | string
+                | Partial<HtmlWebpackPluginOptions> & {
+                      entry: string;
+                      chunks?: string[];
+                  };
+        }
+
+        interface Babel {
+            jsx?: string;
+            transpileModules?: string | string[];
+            namedImports?: string | Babel.NamedImportsOptions;
+        }
+        namespace Babel {
+            interface NamedImportsOptions {
+                [fileExt: string]: {
+                    [ComponentName: string]: string;
+                };
+            }
+        }
+
+        interface Css {
+            extract?: boolean;
+            sourceMap?: boolean;
+            loaderOptions?: Css.LoaderOptions;
+        }
+        namespace Css {
+            interface LoaderOptions {
+                css?: any;
+                sass?: any;
+                postcss?: any;
+                less?: any;
+                stylus?: any;
+            }
+        }
+
+        interface Assets {
+            inlineImageMaxSize?: number;
+        }
+
+        interface Envs {
+            [envName: string]: string;
+        }
+
+        interface Constants {
+            [constantName: string]: string;
+        }
+
+        interface ChainWebpack {
+            (config: WebpackChainConfig, opts: Opts): void;
+        }
+
+        type ConfigureWebpack =
+            | WebpackConfig
+            | ((config: WebpackConfig, opts: Opts) => void | WebpackConfig);
+
+        type PublicFolder = string | boolean;
+
+        interface DevServer {
+            host?: string;
+            port?: string | number;
+            hot?: boolean;
+            hotOnly?: boolean;
+            hotEntries?: string[];
+            historyApiFallback?: WebpackDevServerConfig["historyApiFallback"];
+            open?: boolean;
+            proxy?: string | WebpackDevServerConfig["proxy"];
+            https?: WebpackDevServerConfig["https"];
+            before?: WebpackDevServerConfig["before"];
+            after?: WebpackDevServerConfig["after"];
+            headers?: WebpackDevServerConfig["headers"];
+        }
+
+        interface PluginOption {
+            resolve: string;
+            options?: any;
+        }
+        type Plugins = Array<string | PluginOption>;
+    }
+
+    interface ConfigLoader {
+        resolve(
+            files?: ReadonlyArray<string>,
+            cwd?: string,
+            stopDir?: string
+        ): string | null;
+        resolve(options?: ConfigLoader.Options): string | null;
+
+        load(
+            files?: ReadonlyArray<string>,
+            cwd?: string,
+            stopDir?: string
+        ): any;
+        load(options?: ConfigLoader.Options): any;
+    }
+    namespace ConfigLoader {
+        interface Options {
+            files?: string[];
+            cwd?: string;
+            stopDir?: string;
+            packageKey?: string;
+            parseJSON?: (str: string) => any;
+        }
+    }
+
     interface HookHandler {
         (config: WebpackChainConfig, opts: Opts): void;
     }
 }
+
+export = PoiCore;
diff --git a/types/poi/package.json b/types/poi/package.json
index b348ad1171..54a71aeaf1 100644
--- a/types/poi/package.json
+++ b/types/poi/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "dependencies": {
-        "cac": "^6.4.2",
+        "cac": "~6.4.2",
         "webpack-chain": "^5.2.4"
     }
 }
diff --git a/types/poi/poi-tests.ts b/types/poi/poi-tests.ts
index f7d68fb7b4..82be4a2d49 100644
--- a/types/poi/poi-tests.ts
+++ b/types/poi/poi-tests.ts
@@ -1,3 +1,3 @@
-import { Poi } from "poi";
+import * as PoiCore from "poi";
 
-const poi = new Poi();
+const poi = new PoiCore();