diff --git a/remote_judger/src/providers/codeforces.ts b/remote_judger/src/providers/codeforces.ts
index e4683bb..bacd14f 100644
--- a/remote_judger/src/providers/codeforces.ts
+++ b/remote_judger/src/providers/codeforces.ts
@@ -396,7 +396,6 @@ export default class CodeforcesProvider implements IBasicProvider {
           files.push({
             name: 'answer.code',
             content: body.source,
-            lang: '/',
           });
         }
 
diff --git a/web/app/models/UOJSubmission.php b/web/app/models/UOJSubmission.php
index ee0e0ef..f157115 100644
--- a/web/app/models/UOJSubmission.php
+++ b/web/app/models/UOJSubmission.php
@@ -251,7 +251,7 @@ class UOJSubmission {
 			$zip_file = new ZipArchive();
 			$zip_file->open(UOJContext::storagePath() . $submission->getContent('file_name'), ZipArchive::CREATE);
 			$tot_size = 0;
-			$language = '/';
+			$language = $submission->info['language'];
 
 			foreach ($files as $file) {
 				$zip_file->addFromString($file['name'], $file['content']);