diff --git a/.github/workflows/UpdateVersion.yml b/.github/workflows/UpdateVersion.yml
index ed9c13b32..74a492246 100644
--- a/.github/workflows/UpdateVersion.yml
+++ b/.github/workflows/UpdateVersion.yml
@@ -14,6 +14,7 @@ jobs:
       pull-requests: write
       contents: write
     runs-on: ubuntu-latest
+    if: github.event.pull_request.head.repo.full_name == github.repository && github.actor != 'github-actions[bot]'
     steps:
       - name: Generate a token
         id: generate_token
diff --git a/Update.json b/Update.json
index 043b5b374..b2da406bd 100644
--- a/Update.json
+++ b/Update.json
@@ -3214,6 +3214,17 @@
                 }
             ],
             "Notes": "No release notes were provided for this release."
+        },
+        "2.5.3": {
+            "UpdateDate": 1770358959413,
+            "Prerelease": true,
+            "UpdateContents": [
+                {
+                    "PR": 888,
+                    "Description": "Fix AC code export for 5-digit question IDs"
+                }
+            ],
+            "Notes": "No release notes were provided for this release."
         }
     }
 }
\ No newline at end of file
diff --git a/XMOJ.user.js b/XMOJ.user.js
index 389809d0a..5c71f748b 100644
--- a/XMOJ.user.js
+++ b/XMOJ.user.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         XMOJ
-// @version      2.5.2
+// @version      2.5.3
 // @description  XMOJ增强脚本
 // @author       @XMOJ-Script-dev, @langningchen and the community
 // @namespace    https://github/langningchen
@@ -3002,8 +3002,14 @@ async function main() {
                                                 for (let i = 0; i < ACCode.length; i++) {
                                                     let CurrentCode = ACCode[i];
                                                     if (CurrentCode != "") {
-                                                        let CurrentQuestionID = CurrentCode.substring(7, 11);
-                                                        CurrentCode = CurrentCode.substring(14);
+                                                        let lineBreakPos = CurrentCode.search(/[\r\n]/);
+                                                        if (lineBreakPos === -1) continue;
+                                                        let headerLine = CurrentCode.slice(0, lineBreakPos);
+                                                        let digitMatch = headerLine.match(/\d+/);
+                                                        if (!digitMatch) continue;
+                                                        let CurrentQuestionID = digitMatch[0];
+                                                        let newlinePos = CurrentCode.indexOf('\n');
+                                                        CurrentCode = CurrentCode.slice(newlinePos + 1);
                                                         CurrentCode = CurrentCode.replaceAll("\r", "");
                                                         Zip.file(CurrentQuestionID + ".cpp", CurrentCode);
                                                     }
diff --git a/package.json b/package.json
index b70e2ba31..442a50857 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "xmoj-script",
-  "version": "2.5.2",
+  "version": "2.5.3",
   "description": "an improvement script for xmoj.tech",
   "main": "AddonScript.js",
   "scripts": {