diff --git a/packages/sonic/model.ts b/packages/sonic/model.ts
index 62cdc95f..8997d38c 100644
--- a/packages/sonic/model.ts
+++ b/packages/sonic/model.ts
@@ -19,9 +19,8 @@ bus.on('problem/del', async (domainId, docId) => {
     await sonic.flusho('problem', `${domainId}@content`, docId.toString());
 });
 
-global.Hydro.lib.problemSearch = async (domainId: string, query: string) => {
-    const c = system.get('pagination.problem');
-    const docIds = await sonic.query('problem', `${domainId}@title`, query, { limit: c });
-    if (c - docIds.length > 0) docIds.push(...await sonic.query('problem', `${domainId}@content`, query, { limit: c - docIds.length }));
+global.Hydro.lib.problemSearch = async (domainId: string, query: string, limit = system.get('pagination.problem')) => {
+    const docIds = await sonic.query('problem', `${domainId}@title`, query, { limit });
+    if (limit - docIds.length > 0) docIds.push(...await sonic.query('problem', `${domainId}@content`, query, { limit: limit - docIds.length }));
     return docIds.map(Number);
 };
diff --git a/packages/sonic/package.json b/packages/sonic/package.json
index eed57ce1..350147ca 100644
--- a/packages/sonic/package.json
+++ b/packages/sonic/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/sonic",
-    "version": "1.0.3",
+    "version": "1.0.4",
     "description": "Sonic search service",
     "main": "service.js",
     "typings": "service.d.ts",