diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 591deda72..381276b30 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.13.5",
+    "version": "2.13.6",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/checkers.ts b/packages/hydrojudge/src/checkers.ts
index 91c29402a..999557d8b 100644
--- a/packages/hydrojudge/src/checkers.ts
+++ b/packages/hydrojudge/src/checkers.ts
@@ -39,8 +39,8 @@ const checkers: Record<string, Checker> = {
                                 break;
                             }
                         }
-                        if (usr.length > 20) usrString = `${usrString.substring(0, 16)}...`;
-                        if (std.length > 20) stdString = `${stdString.substring(0, 16)}...`;
+                        if (usrString.length > 20) usrString = `${usrString.substring(0, 16)}...`;
+                        if (stdString.length > 20) stdString = `${stdString.substring(0, 16)}...`;
                         message = { message: 'Read {0}, expect {1}.', params: [usrString, stdString] };
                     }
                 } catch (e) {