diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 82b189b03..4653cf087 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.28.45",
+    "version": "2.28.46",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/upgrade.ts b/packages/hydrooj/src/upgrade.ts
index 62a7ecea7..2b152ce2f 100644
--- a/packages/hydrooj/src/upgrade.ts
+++ b/packages/hydrooj/src/upgrade.ts
@@ -415,6 +415,14 @@ const scripts: UpgradeScript[] = [
         }
         return true;
     },
+    async function _33_34() {
+        const _FRESH_INSTALL_IGNORE = 1;
+        await iterateAllProblem(['content'], async (pdoc) => {
+            if (typeof pdoc.content !== 'string') return;
+            await problem.edit(pdoc.domainId, pdoc.docId, { content: pdoc.content.replace(/%file%:\/\//g, 'file://') });
+        });
+        return true;
+    },
 ];
 
 export default scripts;
diff --git a/packages/vjudge/package.json b/packages/vjudge/package.json
index 73b891cb0..0313c0061 100644
--- a/packages/vjudge/package.json
+++ b/packages/vjudge/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/vjudge",
-    "version": "1.0.3",
+    "version": "1.0.4",
     "description": "Submit problems to remote oj",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/vjudge/src/providers/codeforces.ts b/packages/vjudge/src/providers/codeforces.ts
index 17ccb574f..ab3baaafa 100644
--- a/packages/vjudge/src/providers/codeforces.ts
+++ b/packages/vjudge/src/providers/codeforces.ts
@@ -112,7 +112,7 @@ export default class CodeforcesProvider implements IBasicProvider {
             superagent.get(src).pipe(file);
             const fid = String.random(8);
             files[`${fid}.png`] = file;
-            ele.setAttribute('src', `%file%://${fid}.png`);
+            ele.setAttribute('src', `file://${fid}.png`);
         });
         const title = document.querySelector('.title').innerHTML.trim().split('. ')[1];
         const time = parseInt(document.querySelector('.time-limit').innerHTML.substr(53, 2), 10);