diff --git a/packages/hydrojudge/src/config.ts b/packages/hydrojudge/src/config.ts
index a3d2bb5c..2e0aa6a3 100644
--- a/packages/hydrojudge/src/config.ts
+++ b/packages/hydrojudge/src/config.ts
@@ -35,22 +35,22 @@ const newPath = path.resolve(os.homedir(), '.hydro', 'judge.yaml');
 const config = global.Hydro
     ? JudgeSettings({})
     : (() => {
-        const cfg = JudgeSettings({});
-        const configFilePath = (process.env.CONFIG_FILE || argv.options.config)
-            ? path.resolve(process.env.CONFIG_FILE || argv.options.config)
-            : fs.existsSync(oldPath) ? oldPath : newPath;
-
+        const base: any = {};
         if (process.env.TEMP_DIR || argv.options.tmp) {
-            cfg.tmp_dir = path.resolve(process.env.TEMP_DIR || argv.options.tmp);
+            base.tmp_dir = path.resolve(process.env.TEMP_DIR || argv.options.tmp);
         }
         if (process.env.CACHE_DIR || argv.options.cache) {
-            cfg.cache_dir = path.resolve(process.env.CACHE_DIR || argv.options.cache);
+            base.cache_dir = path.resolve(process.env.CACHE_DIR || argv.options.cache);
         }
         if (process.env.EXECUTION_HOST || argv.options.sandbox) {
-            cfg.sandbox_host = path.resolve(process.env.EXECUTION_HOST || argv.options.sandbox);
+            base.sandbox_host = path.resolve(process.env.EXECUTION_HOST || argv.options.sandbox);
         }
+        const configFilePath = (process.env.CONFIG_FILE || argv.options.config)
+            ? path.resolve(process.env.CONFIG_FILE || argv.options.config)
+            : fs.existsSync(oldPath) ? oldPath : newPath;
         const configFile = fs.readFileSync(configFilePath, 'utf-8');
-        Object.assign(cfg, yaml.load(configFile) as any);
+        Object.assign(base, yaml.load(configFile) as any);
+        const cfg = JudgeSettings(base);
         return JudgeSettings(cfg);
     })();
 
diff --git a/packages/hydrojudge/src/hosts/hydro.ts b/packages/hydrojudge/src/hosts/hydro.ts
index e7dd227c..d1f93e3a 100644
--- a/packages/hydrojudge/src/hosts/hydro.ts
+++ b/packages/hydrojudge/src/hosts/hydro.ts
@@ -225,7 +225,7 @@ export default class Hydro {
             uname: this.config.uname, password: this.config.password, rememberme: 'on',
         });
         const setCookie = res.headers['set-cookie'];
-        await this.setCookie((setCookie instanceof Array) ? setCookie.join(';') : setCookie);
+        await this.setCookie(Array.isArray(setCookie) ? setCookie.join(';') : setCookie);
     }
 
     async ensureLogin() {
diff --git a/packages/hydrooj/src/service/decorators.ts b/packages/hydrooj/src/service/decorators.ts
index 40ff843a..2d32c1bb 100644
--- a/packages/hydrooj/src/service/decorators.ts
+++ b/packages/hydrooj/src/service/decorators.ts
@@ -46,7 +46,7 @@ function _descriptor(v: ParamOption<any>) {
             obj.value = function validate(this: Handler, rawArgs: any, ...extra: any[]) {
                 if (typeof rawArgs !== 'object' || extra.length) return originalMethod.call(this, rawArgs, ...extra);
                 const c = [];
-                const arglist: ParamOption<any>[] = this.__param[target.constructor.name][funcName];
+                const arglist: ParamOption<any>[] = target.__param[target.constructor.name][funcName];
                 for (const item of arglist) {
                     const src = item.source === 'all'
                         ? rawArgs
diff --git a/packages/ui-default/build/config/webpack.ts b/packages/ui-default/build/config/webpack.ts
index 186423f7..3855d9df 100644
--- a/packages/ui-default/build/config/webpack.ts
+++ b/packages/ui-default/build/config/webpack.ts
@@ -1,7 +1,7 @@
 /* eslint-disable global-require */
 import { CleanWebpackPlugin } from 'clean-webpack-plugin';
 import CopyWebpackPlugin from 'copy-webpack-plugin';
-import { ESBuildMinifyPlugin } from 'esbuild-loader';
+import { EsbuildPlugin } from 'esbuild-loader';
 import { DuplicatesPlugin } from 'inspectpack/plugin';
 import ExtractCssPlugin from 'mini-css-extract-plugin';
 import MonacoWebpackPlugin from 'monaco-editor-webpack-plugin';
@@ -214,7 +214,7 @@ export default function (env: { watch?: boolean, production?: boolean, measure?:
         },
       },
       usedExports: true,
-      minimizer: [new ESBuildMinifyPlugin({
+      minimizer: [new EsbuildPlugin({
         css: true,
         minify: true,
         minifySyntax: true,
diff --git a/packages/ui-default/components/socket/index.ts b/packages/ui-default/components/socket/index.ts
index 760fe11e..428b1117 100644
--- a/packages/ui-default/components/socket/index.ts
+++ b/packages/ui-default/components/socket/index.ts
@@ -2,7 +2,7 @@ import ReconnectingWebSocket from 'reconnecting-websocket';
 
 export default class Sock {
   sock: ReconnectingWebSocket;
-  interval: number;
+  interval: NodeJS.Timeout;
 
   constructor(public url: string, nocookie = false) {
     const i = new URL(url, window.location.href);