diff --git a/package.json b/package.json
index a084f85b..2b6dfe99 100644
--- a/package.json
+++ b/package.json
@@ -55,21 +55,21 @@
         "globby": "13.1.3",
         "inspectpack": "^4.7.1",
         "latest-version": "7.0.0",
-        "mini-css-extract-plugin": "^2.7.3",
+        "mini-css-extract-plugin": "^2.7.5",
         "monaco-editor-webpack-plugin": "^7.0.1",
         "mongodb": "^5.1.0",
         "mongodb-memory-server": "^8.12.0",
         "nyc": "^15.1.0",
         "ora": "^6.1.2",
-        "postcss-loader": "^7.0.2",
+        "postcss-loader": "^7.1.0",
         "semver": "^7.3.8",
         "style-loader": "^3.3.2",
         "stylus": "^0.59.0",
         "stylus-loader": "^7.1.0",
         "supertest": "^6.3.3",
         "ts-loader": "^9.4.2",
-        "typescript": "4.9.5",
-        "webpack": "^5.76.1",
+        "typescript": "5.0.2",
+        "webpack": "^5.76.2",
         "webpack-bundle-analyzer": "^4.8.0",
         "webpack-dev-server": "^4.12.0",
         "webpack-manifest-plugin": "^5.0.0",
@@ -80,6 +80,7 @@
         "@types/node": "18.14.1",
         "@types/react": "18.0.28",
         "cosmokit": "1.4.1",
+        "schemastery": "3.7.2",
         "prettier": "npm:not-installable-package@1.0.0"
     }
 }
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index b52a5dea..fc8b615b 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -19,7 +19,7 @@
         "@aws-sdk/s3-request-presigner": "^3.290.0",
         "@graphql-tools/schema": "^9.0.17",
         "@hydrooj/utils": "workspace:*",
-        "@simplewebauthn/server": "^7.0.1",
+        "@simplewebauthn/server": "^7.2.0",
         "adm-zip": "0.5.5",
         "cac": "^6.7.14",
         "cordis": "^2.7.4",
@@ -28,7 +28,7 @@
         "emojis-list": "2.1.0",
         "fs-extra": "^11.1.0",
         "graphql": "^16.6.0",
-        "graphql-scalars": "1.20.1",
+        "graphql-scalars": "1.20.4",
         "js-yaml": "^4.1.0",
         "koa": "^2.14.1",
         "koa-body": "^6.0.1",
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 78840446..3e108da1 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -5,6 +5,7 @@ import type fs from 'fs';
 import type { Dictionary, NumericDictionary } from 'lodash';
 import type { Binary, FindCursor, ObjectId } from 'mongodb';
 import type { Context } from './context';
+import type { DocStatusType } from './model/document';
 import type { ProblemDoc } from './model/problem';
 import type { Handler } from './service/server';
 
@@ -649,7 +650,9 @@ declare module './service/db' {
         'domain.user': any;
         'record': RecordDoc;
         'document': any;
-        'document.status': StatusDocBase;
+        'document.status': StatusDocBase & {
+            [K in keyof DocStatusType]: { docType: K } & DocStatusType[K];
+        }[keyof DocStatusType];
         'discussion.history': DiscussionHistoryDoc;
         'user': Udoc;
         'user.preference': UserPreferenceDoc;
diff --git a/packages/hydrooj/src/model/document.ts b/packages/hydrooj/src/model/document.ts
index ae5c6803..bad2e6a7 100644
--- a/packages/hydrooj/src/model/document.ts
+++ b/packages/hydrooj/src/model/document.ts
@@ -44,6 +44,7 @@ export interface DocType {
 
 export interface DocStatusType {
     [TYPE_PROBLEM]: ProblemStatusDoc,
+    // FIXME: this need to be typed
     [key: number]: any
 }
 
@@ -396,6 +397,7 @@ export async function revPushStatus<T extends keyof DocStatusType>(
     if (!res.value) {
         res = await collStatus.findOneAndUpdate(
             { domainId, docType, docId, uid },
+            // @ts-ignore
             { $push: { [key]: value }, $inc: { rev: 1 } },
             { upsert: true, returnDocument: 'after' },
         );
diff --git a/packages/hydrooj/src/service/decorators.ts b/packages/hydrooj/src/service/decorators.ts
index 40151dc0..2e8792e8 100644
--- a/packages/hydrooj/src/service/decorators.ts
+++ b/packages/hydrooj/src/service/decorators.ts
@@ -5,7 +5,8 @@ import { EventMap } from './bus';
 import type { Handler } from './server';
 
 type MethodDecorator = (target: any, funcName: string, obj: any) => any;
-type ClassDecorator = <T extends new (...args: any[]) => any>(Class: T) => T extends new (...args: infer R) => infer S ? (...args: R) => S : never;
+type ClassDecorator = <T extends new (...args: any[]) => any>(Class: T) => T extends new (...args: infer R) => infer S
+    ? new (...args: R) => S : never;
 export interface ParamOption<T> {
     name: string,
     source: 'all' | 'get' | 'post' | 'route',
@@ -85,7 +86,7 @@ export const post: DescriptorBuilder = (name, ...args) => _descriptor(_buildPara
 export const route: DescriptorBuilder = (name, ...args) => _descriptor(_buildParam(name, 'route', ...args));
 export const param: DescriptorBuilder = (name, ...args) => _descriptor(_buildParam(name, 'all', ...args));
 
-export const subscribe: (name: keyof EventMap) => MethodDecorator | ClassDecorator = (name) => (target, funcName, obj) => {
+export const subscribe: (name: keyof EventMap) => MethodDecorator & ClassDecorator = (name) => (target, funcName?, obj?) => {
     if (funcName) {
         target.__subscribe ||= [];
         target.__subscribe.push({ name, target: obj.value });
diff --git a/packages/ui-default/components/autocomplete/components/AutoComplete.tsx b/packages/ui-default/components/autocomplete/components/AutoComplete.tsx
index f67a4f87..ee0fd0c1 100644
--- a/packages/ui-default/components/autocomplete/components/AutoComplete.tsx
+++ b/packages/ui-default/components/autocomplete/components/AutoComplete.tsx
@@ -34,6 +34,7 @@ export interface AutoCompleteProps<Item> {
   allowEmptyQuery?: boolean;
   freeSolo?: boolean;
   freeSoloConverter?: (value: string) => string;
+  alwaysShowList?: boolean;
 }
 
 export interface AutoCompleteHandle<Item> {
@@ -97,6 +98,7 @@ const AutoComplete = forwardRef(function Impl<T>(props: AutoCompleteProps<T>, re
   const allowEmptyQuery = props.allowEmptyQuery ?? false;
   const freeSolo = props.freeSolo ?? false;
   const freeSoloConverter = freeSolo ? props.freeSoloConverter ?? ((i) => i) : ((i) => i);
+  const alwaysShowList = props.alwaysShowList ?? false;
 
   const [focused, setFocused] = useState(false); // is focused
   const [selected, setSelected] = useState([]); // selected items
@@ -152,7 +154,7 @@ const AutoComplete = forwardRef(function Impl<T>(props: AutoCompleteProps<T>, re
   const handleInputChange = debounce((e?) => queryList(e ? e.target.value : ''), 300);
 
   const toggleItem = (item: T, key = itemKey(item), preserve = false) => {
-    const shouldKeepOpen = allowEmptyQuery && inputRef.current.value === '' && !multi;
+    const shouldKeepOpen = (multi ? alwaysShowList : allowEmptyQuery) && inputRef.current.value === '';
     if (multi) {
       const idx = selectedKeys.indexOf(key);
       if (idx !== -1) {
diff --git a/packages/ui-default/components/autocomplete/components/CustomSelectAutoComplete.tsx b/packages/ui-default/components/autocomplete/components/CustomSelectAutoComplete.tsx
index 9afc9b17..76d4f4cb 100644
--- a/packages/ui-default/components/autocomplete/components/CustomSelectAutoComplete.tsx
+++ b/packages/ui-default/components/autocomplete/components/CustomSelectAutoComplete.tsx
@@ -46,6 +46,7 @@ CustomSelectAutoComplete.defaultProps = {
   selectedKeys: [],
   freeSolo: false,
   freeSoloConverter: (input) => input,
+  alwaysShowList: true,
 };
 
 export default CustomSelectAutoComplete;
diff --git a/packages/ui-default/components/autocomplete/components/FileSelectAutoComplete.tsx b/packages/ui-default/components/autocomplete/components/FileSelectAutoComplete.tsx
index 2c13d905..49e34520 100644
--- a/packages/ui-default/components/autocomplete/components/FileSelectAutoComplete.tsx
+++ b/packages/ui-default/components/autocomplete/components/FileSelectAutoComplete.tsx
@@ -46,6 +46,7 @@ FileSelectAutoComplete.defaultProps = {
   selectedKeys: [],
   freeSolo: false,
   freeSoloConverter: (input) => input,
+  alwaysShowList: true,
 };
 
 export default FileSelectAutoComplete;
diff --git a/packages/ui-default/components/problemconfig/ProblemConfigForm.tsx b/packages/ui-default/components/problemconfig/ProblemConfigForm.tsx
index e606ceed..c9c95079 100644
--- a/packages/ui-default/components/problemconfig/ProblemConfigForm.tsx
+++ b/packages/ui-default/components/problemconfig/ProblemConfigForm.tsx
@@ -85,7 +85,7 @@ function LangConfig() {
             <CustomSelectAutoComplete
               ref={ref}
               data={data}
-              placeholder={i18n('Unlimited')}
+              placeholder={!selectedKeys.length ? i18n('Unlimited') : i18n('Code language')}
               selectedKeys={selectedKeys}
               onChange={(val) => {
                 const value = val.split(',');
diff --git a/packages/ui-default/components/problemconfig/ProblemConfigTree.tsx b/packages/ui-default/components/problemconfig/ProblemConfigTree.tsx
index 34a75589..fcbd219d 100644
--- a/packages/ui-default/components/problemconfig/ProblemConfigTree.tsx
+++ b/packages/ui-default/components/problemconfig/ProblemConfigTree.tsx
@@ -79,7 +79,7 @@ export function SubtaskNode(props: { subtaskId: number }) {
         </span>
       </div>}
       <ul className="bp4-tree-node-list" ref={drop}>
-        {subtaskId !== -1 && <SubtaskSettings subtaskId={subtaskId} time={time} memory={memory} />}
+        {subtaskId !== -1 && <SubtaskSettings subtaskId={subtaskId} subtaskIds={subtaskIds} time={time} memory={memory} />}
         {expand
           ? <SelectionManager subtaskId={subtaskId} subtaskIds={subtaskIds} />
           : <TreeNode
diff --git a/packages/ui-default/components/problemconfig/reducer/config.ts b/packages/ui-default/components/problemconfig/reducer/config.ts
index 5d42ad6c..4483290c 100644
--- a/packages/ui-default/components/problemconfig/reducer/config.ts
+++ b/packages/ui-default/components/problemconfig/reducer/config.ts
@@ -15,17 +15,18 @@ const ajv = new Ajv();
 const validate = ajv.compile(schema);
 
 export default function reducer(state = {
-  type: 'default', __loaded: false, __valid: true, __errors: [], __cases: [],
+  type: 'default', __loaded: false, __valid: true, __errors: [], __cases: [], subtasks: [],
 } as State, action: any = {}): State {
   switch (action.type) {
     case 'CONFIG_LOAD_FULFILLED': {
       try {
-        const data = yaml.load(action.payload.config) as any;
+        let data = yaml.load(action.payload.config) as any;
+        if (typeof data !== 'object') data = { subtasks: [] };
         if (!validate(data)) {
           return { ...state, __valid: false, __errors: validate.errors.map((i) => `${i.instancePath}: ${i.message}`) };
         }
         const subtasks = (data as any).subtasks;
-        for (const subtask of subtasks || []) {
+        for (const subtask of subtasks) {
           if (typeof subtask.id !== 'number') {
             for (let i = 1; ; i++) {
               if (!subtasks.find((s) => s.id === i)) {
diff --git a/packages/ui-default/components/problemconfig/tree/AddTestcase.tsx b/packages/ui-default/components/problemconfig/tree/AddTestcase.tsx
index abfbea4b..32e63841 100644
--- a/packages/ui-default/components/problemconfig/tree/AddTestcase.tsx
+++ b/packages/ui-default/components/problemconfig/tree/AddTestcase.tsx
@@ -13,31 +13,47 @@ export function AddTestcase() {
   const [input, setInput] = React.useState('');
   const [output, setOutput] = React.useState('');
   const [valid, setValid] = React.useState(false);
+  const [autoInput, setAutoInput] = React.useState(true);
+  const [autoOutput, setAutoOutput] = React.useState(true);
   const testdata = useSelector((state: RootState) => state.testdata);
   const store = useStore<RootState>();
   const refInput = useRef();
   const refOutput = useRef();
 
   useEffect(() => {
-    setValid(testdata.find((i) => i.name === input) && testdata.find((i) => i.name === output));
-    if (input && !output) {
+    const inputValid = testdata.find((i) => i.name === input);
+    if (input) setAutoInput(false);
+    else setAutoInput(true);
+    setValid(inputValid);
+    if (inputValid && autoOutput) {
       const filename = input.substring(0, input.lastIndexOf('.'));
       let outputFile = '';
       if (testdata.find((i) => i.name === `${filename}.out`)) outputFile = `${filename}.out`;
       else if (testdata.find((i) => i.name === `${filename}.ans`)) outputFile = `${filename}.ans`;
-      // @ts-ignore
-      refOutput.current!.setSelectedItems([outputFile]);
-      setOutput(outputFile);
+      if (outputFile) {
+        // @ts-ignore
+        refOutput.current!.setSelectedItems([outputFile]);
+        setOutput(outputFile);
+        setAutoOutput(true);
+      }
     }
-    if (output && !input) {
+  }, [input]);
+
+  useEffect(() => {
+    const outputValid = testdata.find((i) => i.name === output);
+    if (output) setAutoOutput(false);
+    else setAutoOutput(true);
+    setValid(outputValid);
+    if (outputValid && autoInput) {
       const filename = output.substring(0, output.lastIndexOf('.'));
       if (testdata.find((i) => i.name === `${filename}.in`)) {
         // @ts-ignore
         refInput.current!.setSelectedItems([`${filename}.in`]);
         setInput(`${filename}.in`);
+        setAutoInput(true);
       }
     }
-  }, [input, output]);
+  }, [output]);
 
   function onConfirm() {
     store.dispatch({
@@ -81,6 +97,8 @@ export function AddTestcase() {
       onClick={() => {
         setInput('');
         setOutput('');
+        setAutoInput(true);
+        setAutoOutput(true);
         setOpen(true);
       }}
     >
diff --git a/packages/ui-default/components/problemconfig/tree/SubtaskSettings.tsx b/packages/ui-default/components/problemconfig/tree/SubtaskSettings.tsx
index 8caf21aa..f90802be 100644
--- a/packages/ui-default/components/problemconfig/tree/SubtaskSettings.tsx
+++ b/packages/ui-default/components/problemconfig/tree/SubtaskSettings.tsx
@@ -8,9 +8,11 @@ import { isEqual } from 'lodash';
 import React, { useEffect } from 'react';
 import { useDispatch, useSelector } from 'react-redux';
 import { i18n } from 'vj/utils';
+import CustomSelectAutoComplete from '../../autocomplete/components/CustomSelectAutoComplete';
 import { RootState } from '../reducer';
 
 interface SubtaskSettingsProps {
+  subtaskIds: number[];
   subtaskId: number;
   time: string;
   memory: string;
@@ -19,6 +21,7 @@ interface SubtaskSettingsProps {
 export function SubtaskSettings(props: SubtaskSettingsProps) {
   const [open, setOpen] = React.useState(false);
   const [depsOpen, setDepsOpen] = React.useState(false);
+  const subtaskIds = props.subtaskIds.filter((i) => i !== props.subtaskId);
   const score = useSelector((state: RootState) => state.config.subtasks.find((i) => i.id === props.subtaskId).score);
   const time = useSelector((state: RootState) => state.config.subtasks.find((i) => i.id === props.subtaskId).time);
   const memory = useSelector((state: RootState) => state.config.subtasks.find((i) => i.id === props.subtaskId).memory);
@@ -88,14 +91,13 @@ export function SubtaskSettings(props: SubtaskSettingsProps) {
     </Dialog>
     <Dialog title={i18n('Set dependencies')} icon="cog" isOpen={depsOpen} onClose={() => setDepsOpen(false)}>
       <DialogBody>
-        <ControlGroup fill={true} vertical={false}>
-          <InputGroup
-            leftElement={<Icon icon="diagram-tree" />}
-            onChange={(ev) => setDeps(ev.currentTarget.value)}
-            placeholder={'Dependencies'}
-            value={cdeps || ''}
-          />
-        </ControlGroup>
+        <CustomSelectAutoComplete
+          data={subtaskIds.map((i) => ({ _id: i, name: `${i18n('Subtask {0}', i)}` }))}
+          setSelectItems={cdeps.split(',').map((i) => i.trim()).filter((i) => +i).map((i) => +i)}
+          onChange={(items) => setDeps(items)}
+          placeholder="dependencies"
+          multi
+        />
       </DialogBody>
       <DialogFooter actions={<Button className="primary rounded button" onClick={onConfirm} intent="primary" text="Save" />} />
     </Dialog>
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 8b3e44f1..56d7bfca 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.48.5",
+  "version": "4.48.6",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "index.ts",
@@ -25,7 +25,7 @@
     "@fontsource/source-code-pro": "^4.5.14",
     "@fontsource/ubuntu-mono": "^4.5.11",
     "@hydrooj/utils": "workspace:*",
-    "@simplewebauthn/browser": "^7.1.0",
+    "@simplewebauthn/browser": "^7.2.0",
     "@svgr/webpack": "^6.5.1",
     "@types/gulp-if": "^0.0.34",
     "@types/jquery": "^3.5.16",
@@ -37,8 +37,8 @@
     "@types/react": "^18.0.28",
     "@types/react-dom": "^18.0.11",
     "@types/redux-logger": "^3.0.9",
-    "@types/serviceworker": "^0.0.65",
-    "@types/sharedworker": "^0.0.94",
+    "@types/serviceworker": "^0.0.66",
+    "@types/sharedworker": "^0.0.95",
     "@types/webpack-env": "^1.18.0",
     "@vscode/codicons": "^0.0.32",
     "ajv": "^8.12.0",
diff --git a/packages/ui-default/pages/problem_config.page.styl b/packages/ui-default/pages/problem_config.page.styl
index 19c6be2b..94ff29e7 100644
--- a/packages/ui-default/pages/problem_config.page.styl
+++ b/packages/ui-default/pages/problem_config.page.styl
@@ -29,6 +29,9 @@
       .button
         margin: 0
 
+  input::placeholder
+    color: rgba(95,107,124,.6)!important
+
   .bp4-input-group
     input
       appearance: none
@@ -46,6 +49,12 @@
       transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1)
       box-shadow: none
 
+  .bp4-tag.bp4-minimal
+    background: transparent
+  
+  .bp4-input-action
+      pointer-events: none
+
   .problem-config-form
     font-family: var(--code-font-family)
   
@@ -54,25 +63,6 @@
     input[type="number"]
       -moz-appearance: textfield
 
-    .bp4-tag.bp4-minimal
-      background: transparent
-    .bp4-input-action
-      pointer-events: none
-
-    .data-table
-      tr
-        border-top: 0
-        border-bottom: 0
-        height: auto
-      td
-        padding: 0
-      .thead td
-        text-align: center
-      td input, td div
-        background: transparent
-
   .hover-row.status-bar
     display: none
-  
-  input::placeholder
-    color: rgba(95,107,124,.6)!important
\ No newline at end of file
+  
\ No newline at end of file