diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 5df3cea35..2938e6ce1 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.13.3",
+    "version": "2.13.4",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index f711318d0..eaa31fbbd 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -347,8 +347,8 @@ class ProblemSettingsHandler extends ProblemManageHandler {
             [this.pdoc.title, 'problem_detail', { pid }, true],
             ['problem_settings', null],
         ];
-        if (this.response.body.config) {
-            this.response.body.config = yaml.safeDump(this.response.body.config);
+        if (this.response.body.pdoc.config) {
+            this.response.body.pdoc.config = yaml.safeDump(this.response.body.pdoc.config);
         }
     }