diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index d85666264..b40adf86b 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.15.23",
+    "version": "2.15.24",
     "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 a5afe144f..a8c7b4b1d 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -165,7 +165,6 @@ export class ProblemRandomHandler extends ProblemHandler {
 
 export class ProblemDetailHandler extends ProblemHandler {
     pdoc: Pdoc;
-
     udoc: User;
 
     @route('pid', Types.String, true, null, parsePid)
@@ -213,6 +212,12 @@ export class ProblemDetailHandler extends ProblemHandler {
         });
         this.back();
     }
+
+    async postDelete() {
+        if (this.pdoc.owner !== this.user._id) this.checkPerm(PERM.PERM_EDIT_PROBLEM);
+        await problem.del(this.pdoc.domainId, this.pdoc.docId);
+        this.response.redirect = this.url('problem_main');
+    }
 }
 
 export class ProblemExportHandler extends ProblemDetailHandler {
@@ -464,7 +469,6 @@ export class ProblemFilesHandler extends ProblemDetailHandler {
     async postUploadFile(domainId: string, filename: string, type = 'testdata') {
         if (!this.request.files.file) throw new ValidationError('file');
         if (this.pdoc.owner !== this.user._id) this.checkPerm(PERM.PERM_EDIT_PROBLEM);
-        else this.checkPerm(PERM.PERM_EDIT_PROBLEM_SELF);
         if (filename === 'testdata.zip') {
             const zip = new AdmZip(this.request.files.file.path);
             const entries = zip.getEntries();
@@ -489,7 +493,6 @@ export class ProblemFilesHandler extends ProblemDetailHandler {
     @post('type', Types.Range(['testdata', 'additional_file']), true)
     async postDeleteFiles(domainId: string, files: string[], type = 'testdata') {
         if (this.pdoc.owner !== this.user._id) this.checkPerm(PERM.PERM_EDIT_PROBLEM);
-        else this.checkPerm(PERM.PERM_EDIT_PROBLEM_SELF);
         if (type === 'testdata') {
             await problem.delTestdata(domainId, this.pdoc.docId, files);
         } else {
diff --git a/packages/hydrooj/src/model/problem.ts b/packages/hydrooj/src/model/problem.ts
index 703c37e80..c221aed8e 100644
--- a/packages/hydrooj/src/model/problem.ts
+++ b/packages/hydrooj/src/model/problem.ts
@@ -141,6 +141,7 @@ export function del(domainId: string, docId: number) {
     return Promise.all([
         document.deleteOne(domainId, document.TYPE_PROBLEM, docId),
         document.deleteMultiStatus(domainId, document.TYPE_PROBLEM, { docId }),
+        storage.list(`problem/${domainId}/${docId}/`, true).then((items) => storage.del(items.map((item) => item.prefix + item.name))),
         bus.parallel('problem/delete', domainId, docId),
     ]);
 }
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index 570bf3c51..ee039cf43 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -660,10 +660,10 @@ export function Route(name: string, path: string, RouteHandler: any, ...permPriv
 
 export class ConnectionHandler extends HandlerCommon {
     conn: sockjs.Connection;
-    args: any;
+    args: Record<string, any>;
     request: {
-        params: any;
-        headers: any;
+        params: Record<string, any>;
+        headers: Record<string, string>;
         ip: string;
     }