diff --git a/packages/hydrooj/src/handler/manage.ts b/packages/hydrooj/src/handler/manage.ts
index 8ea9250a..e2618292 100644
--- a/packages/hydrooj/src/handler/manage.ts
+++ b/packages/hydrooj/src/handler/manage.ts
@@ -107,7 +107,9 @@ class SystemScriptHandler extends SystemHandler {
         }
         const rid = await record.add(domainId, -1, this.user._id, '-', id, false, { input: raw, type: 'pretest' });
         const rdoc = await record.get(rid);
-        const report = (data) => judge.next({ domainId, rid, ...data,rdoc });
+        const report = (data) => judge.next({
+            domainId, rid, ...data, rdoc,
+        });
         report({ message: `Running script: ${id} `, status: STATUS.STATUS_JUDGING });
         const start = Date.now();
         // Maybe async?
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index 21783530..bbba1700 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -396,7 +396,7 @@ export function Connection(
             for (const { name, target } of h.__subscribe || []) disposables.push(bus.on(name, target.bind(h)));
             let lastHeartbeat = Date.now();
             let closed = false;
-            let interval: NodeJS.Timer;
+            let interval: NodeJS.Timeout;
             const clean = () => {
                 if (closed) return;
                 closed = true;
diff --git a/packages/ui-default/backendlib/builder.ts b/packages/ui-default/backendlib/builder.ts
index 3fcabaf9..844d7ef5 100644
--- a/packages/ui-default/backendlib/builder.ts
+++ b/packages/ui-default/backendlib/builder.ts
@@ -47,6 +47,7 @@ const federationPlugin: esbuild.Plugin = {
 
 const build = async (contents: string) => {
   const res = await esbuild.build({
+    tsconfigRaw: '{"compilerOptions":{"experimentalDecorators":true}}',
     format: 'iife' as 'iife',
     bundle: true,
     outdir: tmp,
diff --git a/packages/ui-default/components/socket/index.ts b/packages/ui-default/components/socket/index.ts
index ce573c48..760fe11e 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: NodeJS.Timer;
+  interval: number;
 
   constructor(public url: string, nocookie = false) {
     const i = new URL(url, window.location.href);
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index a6ef4d8c..96cab4c4 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -126,7 +126,7 @@
   },
   "dependencies": {
     "ansi_up": "^6.0.2",
-    "esbuild": "^0.19.7",
+    "esbuild": "0.19.7",
     "fs-extra": "^11.1.1",
     "js-yaml": "^4.1.0",
     "jsesc": "^3.0.2",
diff --git a/packages/utils/lib/register.js b/packages/utils/lib/register.js
index 0aaaddc7..55e79a16 100644
--- a/packages/utils/lib/register.js
+++ b/packages/utils/lib/register.js
@@ -26,6 +26,7 @@ const minor = +process.version.split('.')[1];
 function transform(filename) {
     const code = fs.readFileSync(filename, 'utf-8');
     const result = esbuild.transformSync(code, {
+        tsconfigRaw: '{"compilerOptions":{"experimentalDecorators":true}}',
         sourcefile: filename,
         sourcemap: 'both',
         format: 'cjs',
diff --git a/packages/utils/package.json b/packages/utils/package.json
index a332b357..a8fd9db9 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -9,7 +9,7 @@
     "preferUnplugged": true,
     "dependencies": {
         "cac": "^6.7.14",
-        "esbuild": "^0.19.7",
+        "esbuild": "0.19.7",
         "fs-extra": "^11.1.1",
         "js-yaml": "^4.1.0",
         "moment-timezone": "^0.5.43",