diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 2e336d3ca..41db55f88 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "3.3.7",
+    "version": "3.3.8",
     "main": "./src/index.ts",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/hosts/vj4.ts b/packages/hydrojudge/src/hosts/vj4.ts
index a428ce9da..5ed0a6453 100644
--- a/packages/hydrojudge/src/hosts/vj4.ts
+++ b/packages/hydrojudge/src/hosts/vj4.ts
@@ -255,23 +255,25 @@ export default class VJ4 implements Session {
         if (iniFile) {
             const file = await fs.readFile(`${folder}/${iniFile}`, 'utf-8');
             await fs.writeFile(`${folder}/config.ini`, file.toLowerCase());
-            for (const i of files) {
-                if (i.toLowerCase() === 'input') await fs.rename(`${folder}/${i}`, `${folder}/input`);
-                else if (i.toLowerCase() === 'output') await fs.rename(`${folder}/${i}`, `${folder}/output`);
-            }
-            files = await fs.readdir(`${folder}/input`);
-            for (const i of files) {
-                if (fs.statSync(`${folder}/input/${i}`).size > 64 * 1024 * 1024) {
-                    await fs.rename(`${folder}/input/${i}`, `${folder}/${i.toLowerCase()}`);
-                } else {
-                    const buffer = await fs.readFile(`${folder}/input/${i}`);
-                    const data = buffer.toString().replace(/\r/g, '');
-                    await fs.unlink(`${folder}/input/${i}`);
-                    await fs.writeFile(`${folder}/${i.toLowerCase()}`, data);
+            const input = files.find((i) => i.toLowerCase() === 'input');
+            const output = files.find((i) => i.toLowerCase() === 'output');
+            if (input) {
+                for (const i of await fs.readdir(`${folder}/${input}`)) {
+                    if (fs.statSync(`${folder}/${input}/${i}`).size > 64 * 1024 * 1024) {
+                        await fs.rename(`${folder}/${input}/${i}`, `${folder}/${i.toLowerCase()}`);
+                    } else {
+                        const buffer = await fs.readFile(`${folder}/${input}/${i}`);
+                        const data = buffer.toString().replace(/\r/g, '');
+                        await fs.unlink(`${folder}/${input}/${i}`);
+                        await fs.writeFile(`${folder}/${i.toLowerCase()}`, data);
+                    }
+                }
+            }
+            if (output) {
+                for (const i of await fs.readdir(`${folder}/${output}`)) {
+                    await fs.rename(`${folder}/${output}/${i}`, `${folder}/${i.toLowerCase()}`);
                 }
             }
-            files = await fs.readdir(`${folder}/output`);
-            for (const i of files) await fs.rename(`${folder}/output/${i.toLowerCase()}`, `${folder}/${i}`);
         }
     }