diff --git a/Update.json b/Update.json
index e12d6229..b6341a37 100644
--- a/Update.json
+++ b/Update.json
@@ -3423,16 +3423,16 @@
             ],
             "Notes": "<b>Bug 修复</b><br>\n- 修复了暗色模式下比赛排名表（contestrank-oi.php 和 contestrank-correct.php）颜色显示异常的问题（#916）<br>\n- 修复了 WebSocket 弹窗通知未遵循各功能独立弹窗开关（BBSPopup/MessagePopup）的问题（#919）"
         },
-        "3.3.1": {
-            "UpdateDate": 1772981411290,
+        "3.4.0": {
+            "UpdateDate": 1773332303425,
             "Prerelease": true,
             "UpdateContents": [
                 {
-                    "PR": 924,
-                    "Description": "Add ImageEnlarger feature with modal viewer"
+                    "PR": 931,
+                    "Description": "Fix problem switcher not update"
                 }
             ],
-            "Notes": "No release notes were provided for this release."
+            "Notes": "Fix ProblemSwitcher Not Update"
         }
     }
 }
\ No newline at end of file
diff --git a/XMOJ.user.js b/XMOJ.user.js
index 49538eed..e4fddd5e 100644
--- a/XMOJ.user.js
+++ b/XMOJ.user.js
@@ -1,6 +1,6 @@
 // ==UserScript==
 // @name         XMOJ
-// @version      3.3.1
+// @version      3.4.0
 // @description  XMOJ增强脚本
 // @author       @XMOJ-Script-dev, @langningchen and the community
 // @namespace    https://github/langningchen
@@ -533,6 +533,29 @@ let RequestAPI = (Action, Data, CallBack) => {
     }
 };
 
+unsafeWindow.GetContestProblemList = async function(RefreshList) {
+    try {
+        const contestReq = await fetch("https://www.xmoj.tech/contest.php?cid=" + SearchParams.get("cid"));
+        const res = await contestReq.text();
+        if (contestReq.status === 200 && res.indexOf("比赛尚未开始或私有，不能查看题目。") === -1) {
+            const parser = new DOMParser();
+            const dom = parser.parseFromString(res, "text/html");
+            const rows = (dom.querySelector("#problemset > tbody")).rows;
+            let problemList = [];
+            for (let i = 0; i < rows.length; i++) {
+                problemList.push({
+                    "title": rows[i].children[2].innerText,
+                    "url": rows[i].children[2].children[0].href
+                });
+            }
+            localStorage.setItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList", JSON.stringify(problemList));
+            if (RefreshList) location.reload();
+        }
+    } catch (e) {
+        console.error(e);
+    }
+}
+
 // WebSocket Notification System
 let NotificationSocket = null;
 let NotificationSocketReconnectAttempts = 0;
@@ -2272,22 +2295,8 @@ async function main() {
                         }
                         let ContestProblemList = localStorage.getItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList");
                         if (ContestProblemList == null) {
-                            const contestReq = await fetch("https://www.xmoj.tech/contest.php?cid=" + SearchParams.get("cid"));
-                            const res = await contestReq.text();
-                            if (contestReq.status === 200 && res.indexOf("比赛尚未开始或私有，不能查看题目。") === -1) {
-                                const parser = new DOMParser();
-                                const dom = parser.parseFromString(res, "text/html");
-                                const rows = (dom.querySelector("#problemset > tbody")).rows;
-                                let problemList = [];
-                                for (let i = 0; i < rows.length; i++) {
-                                    problemList.push({
-                                        "title": rows[i].children[2].innerText,
-                                        "url": rows[i].children[2].children[0].href
-                                    });
-                                }
-                                localStorage.setItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList", JSON.stringify(problemList));
-                                ContestProblemList = JSON.stringify(problemList);
-                            }
+                            unsafeWindow.GetContestProblemList(false);
+                            ContestProblemList = localStorage.getItem("UserScript-Contest-" + SearchParams.get("cid") + "-ProblemList");
                         }
 
                         let problemSwitcher = document.createElement("div");
@@ -2310,6 +2319,7 @@ async function main() {
                         problemSwitcher.style.flexDirection = "column";
 
                         let problemList = JSON.parse(ContestProblemList);
+                        problemSwitcher.innerHTML += `<a href="javascript:void(0)" onclick="GetContestProblemList(true)" title="刷新列表" class="mb-2" style="text-align: center;" active>刷新</a>`;
                         for (let i = 0; i < problemList.length; i++) {
                             let buttonText = "";
                             if (i < 26) {
@@ -6069,4 +6079,4 @@ int main()
 
 main().then(r => {
     console.log("XMOJ-Script loaded successfully!");
-});
\ No newline at end of file
+});
diff --git a/package.json b/package.json
index 9ffb1aa4..86a7ba56 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "xmoj-script",
-  "version": "3.3.1",
+  "version": "3.4.0",
   "description": "an improvement script for xmoj.tech",
   "main": "AddonScript.js",
   "scripts": {