diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index d882e845f..79d25980e 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/hydrojudge",
-    "version": "2.0.0",
+    "version": "2.0.1",
     "main": "package.json",
     "author": "masnn",
     "os": [
diff --git a/packages/hydrojudge/src/cases.ts b/packages/hydrojudge/src/cases.ts
index a04291c5e..1bf0f398f 100644
--- a/packages/hydrojudge/src/cases.ts
+++ b/packages/hydrojudge/src/cases.ts
@@ -1,5 +1,4 @@
 import fs from 'fs-extra';
-import yaml from 'js-yaml';
 import path from 'path';
 import { Dictionary } from 'lodash';
 import { FormatError, SystemError } from './error';