diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index de0626b2b..afaa39db6 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -554,7 +554,7 @@ const ledo = buildContestRule({
         for (const pid of tdoc.pids) {
             row.push({
                 type: 'record',
-                value: tsddict[pid]?.penaltyScore || '',
+                value: tsddict[pid]?.penaltyScore?.toString() || '',
                 hover: tsddict[pid]?.ntry ? `-${tsddict[pid].ntry} (${Math.round(Math.max(0.7, 0.95 ** tsddict[pid].ntry) * 100)}%)` : '',
                 raw: tsddict[pid]?.rid,
                 style: tsddict[pid]?.status === STATUS.STATUS_ACCEPTED && tsddict[pid]?.rid.getTimestamp().getTime() === meta?.first?.[pid]