diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 6e429796..f3d4b8fb 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -49,7 +49,6 @@
         "require-resolve-hook": "^1.1.0",
         "saslprep": "^1.0.3",
         "schemastery": "^3.11.1",
-        "search-query-parser": "^1.6.0",
         "semver": "^7.5.4",
         "serialize-javascript": "^6.0.1",
         "superagent": "^8.0.9",
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 14dcd7db..0d49eb20 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -5,7 +5,7 @@ import {
 } from 'lodash';
 import { Filter, ObjectId } from 'mongodb';
 import { nanoid } from 'nanoid';
-import parser from 'search-query-parser';
+import parser from '@hydrooj/utils/lib/search';
 import { sortFiles, streamToBuffer } from '@hydrooj/utils/lib/utils';
 import {
     BadRequestError, ContestNotAttendedError, ContestNotEndedError, ContestNotFoundError, ContestNotLiveError,
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 06e9a291..5c47fa9c 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -126,7 +126,6 @@
     "markdown-it-table-of-contents": "^0.6.0",
     "nunjucks": "^3.2.4",
     "schemastery-jsonschema": "^1.0.3",
-    "search-query-parser": "^1.6.0",
     "streamsaver": "^2.0.6",
     "xss": "^1.0.14"
   }
diff --git a/packages/ui-default/pages/problem_main.page.ts b/packages/ui-default/pages/problem_main.page.ts
index bbfad2ff..2c5af165 100644
--- a/packages/ui-default/pages/problem_main.page.ts
+++ b/packages/ui-default/pages/problem_main.page.ts
@@ -1,6 +1,6 @@
+import parser, { SearchParserResult } from '@hydrooj/utils/lib/search';
 import $ from 'jquery';
 import _ from 'lodash';
-import parser from 'search-query-parser';
 import DomainSelectAutoComplete from 'vj/components/autocomplete/DomainSelectAutoComplete';
 import { ActionDialog, ConfirmDialog } from 'vj/components/dialog';
 import Dropdown from 'vj/components/dropdown/Dropdown';
@@ -30,7 +30,7 @@ const parserOptions = {
 
 function writeSelectionToInput() {
   const currentValue = $('[name="q"]').val() as string;
-  const parsedCurrentValue = parser.parse(currentValue, parserOptions) as parser.SearchParserResult;
+  const parsedCurrentValue = parser.parse(currentValue, parserOptions) as SearchParserResult;
   const q = parser.stringify({
     ...parsedCurrentValue,
     category: selections,
@@ -138,7 +138,7 @@ function buildCategoryFilter() {
 }
 
 function parseCategorySelection() {
-  const parsed = parser.parse($('[name="q"]').val() as string || '', parserOptions) as parser.SearchParserResult;
+  const parsed = parser.parse($('[name="q"]').val() as string || '', parserOptions) as SearchParserResult;
   selections = _.uniq(parsed.category || []);
   updateSelection();
 }
diff --git a/packages/utils/lib/search.ts b/packages/utils/lib/search.ts
new file mode 100644
index 00000000..e4f5dbd5
--- /dev/null
+++ b/packages/utils/lib/search.ts
@@ -0,0 +1,36 @@
+import { parse, SearchParserOptions, SearchParserResult } from 'search-query-parser';
+
+export { parse, SearchParserOptions, SearchParserResult } from 'search-query-parser';
+
+export function stringify(queryObject: SearchParserResult, options: SearchParserOptions = {}, prefix = ''): string {
+    if (!Object.keys(queryObject || {}).length) return '';
+    prefix ||= '';
+    const toArray = (val: string | string[]) => (typeof val === 'string' ? [val] : val);
+    const addQuotes = (s: string) => (s.indexOf(' ') > -1 ? JSON.stringify(s) : s);
+    const addPrefix = (s: string) => prefix + s;
+    const parts = [];
+    if (queryObject.text) {
+        const value = toArray(queryObject.text);
+        if (value.length) parts.push(value.map(addQuotes).map(addPrefix).join(' '));
+    }
+    for (const range of options.ranges || []) {
+        if (!queryObject[range]) continue;
+        let value = queryObject[range].from;
+        const to = queryObject[range].to;
+        if (to) value = `${value}-${to}`;
+        if (value) parts.push(addPrefix(`${range}:${value}`));
+    }
+    for (const keyword of options.keywords || []) {
+        if (!queryObject[keyword]) continue;
+        const value = toArray(queryObject[keyword]);
+        if (value.length > 0) {
+            parts.push(addPrefix(`${keyword}:${addQuotes(value.join(','))}`));
+        }
+    }
+    if (Object.keys(queryObject.exclude || {}).length) {
+        parts.push(stringify(queryObject.exclude, options, '-'));
+    }
+    return parts.join(' ');
+}
+
+export default { stringify, parse };
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 82bb5be6..f1d08be0 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -15,6 +15,7 @@
         "moment-timezone": "^0.5.43",
         "mongodb": "^5.7.0",
         "reggol": "^1.4.4",
+        "search-query-parser": "^1.6.0",
         "source-map-support": "^0.5.21",
         "systeminformation": "^5.18.8"
     },