diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 12a9cbcd8..940278a75 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.5.18",
+    "version": "2.5.19",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/cases.ts b/packages/hydrojudge/src/cases.ts
index 276760932..353784679 100644
--- a/packages/hydrojudge/src/cases.ts
+++ b/packages/hydrojudge/src/cases.ts
@@ -123,7 +123,8 @@ async function read1(folder: string, files: string[], checkFile, cfg, rst) {
                                 type: 'min',
                                 cases: [c],
                             }];
-                        } else subtask[REG.subtask(data)].cases.push(c);
+                        } else if (!subtask[REG.subtask(data)].cases) subtask[REG.subtask(data)].cases = [c];
+                        else subtask[REG.subtask(data)].cases.push(c);
                         break;
                     }
                 }