diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index c2c37b1d9..e6c3c8440 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "4.0.14",
+    "version": "4.0.15",
     "bin": "bin/hydrooj.js",
     "main": "src/plugin-api",
     "module": "src/plugin-api",
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index f02c8afed..18a0207c7 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -400,7 +400,7 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
                         return `="./${this.pdoc.docId}/file/${info[1]}${info[1].includes('?') ? '&' : '?'}tid=${args[1]}"`;
                     })
                     .replace(/=\\"file:\/\/(.+?)\\"/g, (str) => {
-                        const info = str.match(/=\\"file:\/\/(.+?)"/);
+                        const info = str.match(/=\\"file:\/\/(.+?)\\"/);
                         return `=\\"./${this.pdoc.docId}/file/${info[1]}${info[1].includes('?') ? '&' : '?'}tid=${args[1]}\\"`;
                     });
             } else {