diff --git a/v2rayN/ServiceLib/Manager/CoreInfoManager.cs b/v2rayN/ServiceLib/Manager/CoreInfoManager.cs
index bda3108a..de5875e5 100644
--- a/v2rayN/ServiceLib/Manager/CoreInfoManager.cs
+++ b/v2rayN/ServiceLib/Manager/CoreInfoManager.cs
@@ -229,6 +229,7 @@ public sealed class CoreInfoManager
                     DownloadUrlLinuxLoong64 = urlSingbox + "/download/{0}/sing-box-{1}-linux-loong64.tar.gz",
                     DownloadUrlOSX64 = urlSingbox + "/download/{0}/sing-box-{1}-darwin-amd64.tar.gz",
                     DownloadUrlOSXArm64 = urlSingbox + "/download/{0}/sing-box-{1}-darwin-arm64.tar.gz",
+                    LockedMaxVersion = new SemanticVersion(1, 14, int.MaxValue),
                     Match = "sing-box",
                     VersionArg = "version",
                 },
diff --git a/v2rayN/ServiceLib/Models/CoreConfigs/CoreInfo.cs b/v2rayN/ServiceLib/Models/CoreConfigs/CoreInfo.cs
index 1cb23af0..df5f3667 100644
--- a/v2rayN/ServiceLib/Models/CoreConfigs/CoreInfo.cs
+++ b/v2rayN/ServiceLib/Models/CoreConfigs/CoreInfo.cs
@@ -16,6 +16,7 @@ public class CoreInfo
     public string? DownloadUrlLinuxLoong64 { get; set; }
     public string? DownloadUrlOSX64 { get; set; }
     public string? DownloadUrlOSXArm64 { get; set; }
+    public SemanticVersion? LockedMaxVersion { get; set; }
     public string? Match { get; set; }
     public string? VersionArg { get; set; }
     public bool AbsolutePath { get; set; }
diff --git a/v2rayN/ServiceLib/Models/Dto/SemanticVersion.cs b/v2rayN/ServiceLib/Models/Dto/SemanticVersion.cs
index 1e66353c..8af2f5fb 100644
--- a/v2rayN/ServiceLib/Models/Dto/SemanticVersion.cs
+++ b/v2rayN/ServiceLib/Models/Dto/SemanticVersion.cs
@@ -1,18 +1,20 @@
 namespace ServiceLib.Models.Dto;
 
-public class SemanticVersion
+public class SemanticVersion : IEquatable<SemanticVersion>, IComparable
 {
+    private readonly string? build;
     private readonly int major;
     private readonly int minor;
     private readonly int patch;
-    private readonly string version;
+    private readonly string? prerelease;
+    private readonly string raw;
 
     public SemanticVersion(int major, int minor, int patch)
     {
         this.major = major;
         this.minor = minor;
         this.patch = patch;
-        version = $"{major}.{minor}.{patch}";
+        raw = $"{major}.{minor}.{patch}";
     }
 
     public SemanticVersion(string? version)
@@ -24,26 +26,41 @@ public class SemanticVersion
                 major = 0;
                 minor = 0;
                 patch = 0;
+                raw = $"{major}.{minor}.{patch}";
                 return;
             }
-            this.version = version.RemovePrefix('v');
+            raw = version;
 
-            var parts = this.version.Split('.');
-            if (parts.Length == 2)
+            var span = version.StartsWith("v", StringComparison.OrdinalIgnoreCase)
+                ? version.AsSpan(1)
+                : version.AsSpan();
+            var plusIdx = span.IndexOf('+');
+            var metadataSpan = plusIdx >= 0 ? span[(plusIdx + 1)..] : [];
+            var leftOfPlus = plusIdx >= 0 ? span[..plusIdx] : span;
+            var dashIdx = leftOfPlus.IndexOf('-');
+            var versionSpan = dashIdx >= 0 ? leftOfPlus[..dashIdx] : leftOfPlus;
+            var preReleaseSpan = dashIdx >= 0 ? leftOfPlus[(dashIdx + 1)..] : [];
+
+            build = metadataSpan.Length > 0 ? metadataSpan.ToString() : null;
+            prerelease = preReleaseSpan.Length > 0 ? preReleaseSpan.ToString() : null;
+
+            var parts = versionSpan.ToString().Split('.');
+            switch (parts.Length)
             {
-                major = int.Parse(parts.First());
-                minor = int.Parse(parts.Last());
-                patch = 0;
-            }
-            else if (parts.Length is 3 or 4)
-            {
-                major = int.Parse(parts[0]);
-                minor = int.Parse(parts[1]);
-                patch = int.Parse(parts[2]);
-            }
-            else
-            {
-                throw new ArgumentException("Invalid version string");
+                case 2:
+                    major = int.Parse(parts.First());
+                    minor = int.Parse(parts.Last());
+                    patch = 0;
+                    break;
+
+                case 3 or 4:
+                    major = int.Parse(parts[0]);
+                    minor = int.Parse(parts[1]);
+                    patch = int.Parse(parts[2]);
+                    break;
+
+                default:
+                    throw new ArgumentException("Invalid version string");
             }
         }
         catch
@@ -51,135 +68,186 @@ public class SemanticVersion
             major = 0;
             minor = 0;
             patch = 0;
+            raw = $"{major}.{minor}.{patch}";
+        }
+    }
+
+    public bool Equals(SemanticVersion? other)
+    {
+        if (other is null)
+        {
+            return false;
+        }
+        if (ReferenceEquals(this, other))
+        {
+            return true;
+        }
+        return major == other.major && minor == other.minor && patch == other.patch && prerelease == other.prerelease;
+    }
+
+    public static bool TryParse(string? version, out SemanticVersion? result)
+    {
+        try
+        {
+            result = new SemanticVersion(version);
+            return true;
+        }
+        catch
+        {
+            result = null;
+            return false;
         }
     }
 
     public override bool Equals(object? obj)
     {
-        if (obj is SemanticVersion other)
-        {
-            return major == other.major && minor == other.minor && patch == other.patch;
-        }
-        else
-        {
-            return false;
-        }
+        return obj is SemanticVersion other && Equals(other);
     }
 
     public override int GetHashCode()
     {
-        return major.GetHashCode() ^ minor.GetHashCode() ^ patch.GetHashCode();
+        return HashCode.Combine(major, minor, patch, prerelease);
     }
 
-    /// <summary>
-    /// Use ToVersionString(string? prefix) instead if possible.
-    /// </summary>
-    /// <returns>major.minor.patch</returns>
     public override string ToString()
     {
-        return version;
+        return raw;
     }
 
-    public string ToVersionString(string? prefix = null)
+    public string ToStandardVersionString(string? prefix = null)
     {
-        if (prefix == null)
+        var sb = new StringBuilder();
+        if (!string.IsNullOrEmpty(prefix))
         {
-            return version;
+            sb.Append(prefix);
         }
-        else
+        sb.Append($"{major}.{minor}.{patch}");
+        if (!string.IsNullOrEmpty(prerelease))
         {
-            return $"{prefix}{version}";
+            sb.Append($"-{prerelease}");
         }
+        if (!string.IsNullOrEmpty(build))
+        {
+            sb.Append($"+{build}");
+        }
+        return sb.ToString();
     }
 
-    public static bool operator ==(SemanticVersion v1, SemanticVersion v2)
-    { return v1.Equals(v2); }
+    public static bool operator <(SemanticVersion left, SemanticVersion right)
+    {
+        return left.CompareTo(right) < 0;
+    }
 
-    public static bool operator !=(SemanticVersion v1, SemanticVersion v2)
-    { return !v1.Equals(v2); }
+    public static bool operator >(SemanticVersion left, SemanticVersion right)
+    {
+        return left.CompareTo(right) > 0;
+    }
 
-    public static bool operator >=(SemanticVersion v1, SemanticVersion v2)
-    { return v1.GreaterEquals(v2); }
+    public static bool operator <=(SemanticVersion left, SemanticVersion right)
+    {
+        return left.CompareTo(right) <= 0;
+    }
 
-    public static bool operator <=(SemanticVersion v1, SemanticVersion v2)
-    { return v1.LessEquals(v2); }
+    public static bool operator >=(SemanticVersion left, SemanticVersion right)
+    {
+        return left.CompareTo(right) >= 0;
+    }
 
     #region Private
 
-    private bool GreaterEquals(SemanticVersion other)
+    public int CompareTo(SemanticVersion other)
     {
-        if (major < other.major)
+        if (major != other.major)
         {
-            return false;
+            return major.CompareTo(other.major);
         }
-        else if (major > other.major)
+        if (minor != other.minor)
         {
-            return true;
+            return minor.CompareTo(other.minor);
         }
-        else
+        if (patch != other.patch)
         {
-            if (minor < other.minor)
+            return patch.CompareTo(other.patch);
+        }
+        return ComparePreRelease(prerelease, other.prerelease);
+    }
+
+    public int CompareTo(object? obj)
+    {
+        if (obj is null)
+        {
+            return 1;
+        }
+        if (obj is SemanticVersion other)
+        {
+            return CompareTo(other);
+        }
+        throw new ArgumentException("Object is not a SemanticVersion");
+    }
+
+    private static int ComparePreRelease(string? left, string? right)
+    {
+        if (string.IsNullOrEmpty(left) && string.IsNullOrEmpty(right))
+        {
+            return 0;
+        }
+        if (string.IsNullOrEmpty(left))
+        {
+            return 1;
+        }
+        if (string.IsNullOrEmpty(right))
+        {
+            return -1;
+        }
+
+        var leftSpan = left.AsSpan();
+        var rightSpan = right.AsSpan();
+        using var leftEnum = leftSpan.Split('.').GetEnumerator();
+        using var rightEnum = rightSpan.Split('.').GetEnumerator();
+
+        while (true)
+        {
+            var hasLeft = leftEnum.MoveNext();
+            var hasRight = rightEnum.MoveNext();
+
+            if (!hasLeft && !hasRight)
             {
-                return false;
+                return 0;
             }
-            else if (minor > other.minor)
+            if (!hasLeft)
             {
-                return true;
+                return -1;
             }
-            else
+            if (!hasRight)
             {
-                if (patch < other.patch)
-                {
-                    return false;
-                }
-                else if (patch > other.patch)
-                {
-                    return true;
-                }
-                else
-                {
-                    return true;
-                }
+                return 1;
+            }
+
+            var leftSegment = leftSpan[leftEnum.Current];
+            var rightSegment = rightSpan[rightEnum.Current];
+
+            var segCmp = CompareSegment(leftSegment, rightSegment);
+            if (segCmp != 0)
+            {
+                return segCmp;
             }
         }
     }
 
-    private bool LessEquals(SemanticVersion other)
+    private static int CompareSegment(ReadOnlySpan<char> left, ReadOnlySpan<char> right)
     {
-        if (major < other.major)
+        var leftIsNum = ulong.TryParse(left, out var leftNum);
+        var rightIsNum = ulong.TryParse(right, out var rightNum);
+
+        return (leftIsNum, rightIsNum) switch
         {
-            return true;
-        }
-        else if (major > other.major)
-        {
-            return false;
-        }
-        else
-        {
-            if (minor < other.minor)
-            {
-                return true;
-            }
-            else if (minor > other.minor)
-            {
-                return false;
-            }
-            else
-            {
-                if (patch < other.patch)
-                {
-                    return true;
-                }
-                else if (patch > other.patch)
-                {
-                    return false;
-                }
-                else
-                {
-                    return true;
-                }
-            }
-        }
+            (true, true) => leftNum.CompareTo(rightNum),
+
+            (false, true) => 1,
+            (true, false) => -1,
+
+            (false, false) => left.SequenceCompareTo(right),
+        };
     }
 
     #endregion Private
diff --git a/v2rayN/ServiceLib/Services/UpdateService.cs b/v2rayN/ServiceLib/Services/UpdateService.cs
index c38bed7d..11b1d3ef 100644
--- a/v2rayN/ServiceLib/Services/UpdateService.cs
+++ b/v2rayN/ServiceLib/Services/UpdateService.cs
@@ -1,6 +1,6 @@
 namespace ServiceLib.Services;
 
-public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
+public partial class UpdateService(Config config, Func<bool, string, Task> updateFunc)
 {
     private readonly Config? _config = config;
     private readonly Func<bool, string, Task>? _updateFunc = updateFunc;
@@ -174,7 +174,7 @@ public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
     {
         var coreInfo = CoreInfoManager.Instance.GetCoreInfo(type);
         var tagName = string.Empty;
-        if (preRelease)
+        if (preRelease || coreInfo?.LockedMaxVersion != null)
         {
             var url = coreInfo?.ReleaseApiUrl;
             var result = await downloadHandle.TryDownloadString(url, true, Global.AppName);
@@ -187,6 +187,24 @@ public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
             var gitHubRelease = preRelease ? gitHubReleases?.First() : gitHubReleases?.First(r => r.Prerelease == false);
             tagName = gitHubRelease?.TagName;
             //var body = gitHubRelease?.Body;
+
+            if (coreInfo?.LockedMaxVersion != null)
+            {
+                var lockedMaxVersion = coreInfo.LockedMaxVersion;
+                var remoteVersion = new SemanticVersion(tagName);
+                if (remoteVersion > lockedMaxVersion)
+                {
+                    var fallbackRelease = gitHubReleases?
+                        .Where(r => preRelease || !r.Prerelease)
+                        .Select(r => new { Release = r, IsValid = SemanticVersion.TryParse(r.TagName, out var v), Version = v })
+                        .Where(x => x.IsValid && x.Version <= coreInfo.LockedMaxVersion)
+                        .MaxBy(x => x.Version)?
+                        .Release;
+
+                    gitHubRelease = fallbackRelease;
+                    tagName = gitHubRelease?.TagName;
+                }
+            }
         }
         else
         {
@@ -202,6 +220,9 @@ public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
         return new UpdateResult(true, new SemanticVersion(tagName));
     }
 
+    [GeneratedRegex(@"v?(?<version>\d+\.\d+\.\d+(?:-[0-9a-zA-Z.-]+)?(?:\+[0-9a-zA-Z.-]+)?)", RegexOptions.IgnoreCase)]
+    private static partial Regex SemVerRegex();
+
     private async Task<SemanticVersion> GetCoreVersion(ECoreType type)
     {
         try
@@ -227,23 +248,7 @@ public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
 
             var result = await Utils.GetCliWrapOutput(filePath, coreInfo.VersionArg);
             var echo = result ?? "";
-            var version = string.Empty;
-            switch (type)
-            {
-                case ECoreType.v2fly:
-                case ECoreType.Xray:
-                case ECoreType.v2fly_v5:
-                    version = Regex.Match(echo, $"{coreInfo.Match} ([0-9.]+) \\(").Groups[1].Value;
-                    break;
-
-                case ECoreType.mihomo:
-                    version = Regex.Match(echo, $"v[0-9.]+").Groups[0].Value;
-                    break;
-
-                case ECoreType.sing_box:
-                    version = Regex.Match(echo, $"([0-9.]+)").Groups[1].Value;
-                    break;
-            }
+            var version = SemVerRegex().Match(echo).Groups["version"].Value;
             return new SemanticVersion(version);
         }
         catch (Exception ex)
@@ -269,30 +274,25 @@ public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
                 case ECoreType.v2fly:
                 case ECoreType.Xray:
                 case ECoreType.v2fly_v5:
-                    {
-                        curVersion = await GetCoreVersion(type);
-                        message = string.Format(ResUI.IsLatestCore, type, curVersion.ToVersionString("v"));
-                        url = string.Format(coreUrl, version.ToVersionString("v"));
-                        break;
-                    }
                 case ECoreType.mihomo:
                     {
                         curVersion = await GetCoreVersion(type);
-                        message = string.Format(ResUI.IsLatestCore, type, curVersion);
-                        url = string.Format(coreUrl, version.ToVersionString("v"));
+                        message = string.Format(ResUI.IsLatestCore, type, curVersion.ToStandardVersionString("v"));
+                        url = string.Format(coreUrl, version);
                         break;
                     }
+
                 case ECoreType.sing_box:
                     {
                         curVersion = await GetCoreVersion(type);
-                        message = string.Format(ResUI.IsLatestCore, type, curVersion.ToVersionString("v"));
-                        url = string.Format(coreUrl, version.ToVersionString("v"), version);
+                        message = string.Format(ResUI.IsLatestCore, type, curVersion.ToStandardVersionString("v"));
+                        url = string.Format(coreUrl, version, version.ToString().RemovePrefix("v"));
                         break;
                     }
                 case ECoreType.v2rayN:
                     {
                         curVersion = new SemanticVersion(Utils.GetVersionInfo());
-                        message = string.Format(ResUI.IsLatestN, type, curVersion);
+                        message = string.Format(ResUI.IsLatestN, type, curVersion.ToStandardVersionString("v"));
                         url = string.Format(coreUrl, version);
                         break;
                     }
@@ -300,7 +300,7 @@ public class UpdateService(Config config, Func<bool, string, Task> updateFunc)
                     throw new ArgumentException("Type");
             }
 
-            if (curVersion >= version && version != new SemanticVersion(0, 0, 0))
+            if (curVersion >= version && !version.Equals(new SemanticVersion(0, 0, 0)))
             {
                 return new UpdateResult(false, message);
             }
diff --git a/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs b/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
index 9a2133f4..f9b8eb19 100644
--- a/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/CheckUpdateViewModel.cs
@@ -193,7 +193,7 @@ public partial class CheckUpdateViewModel : MyReactiveObject
                 }
                 await CheckUpdateN(EnableCheckPreReleaseUpdate);
             }
-            else if (item.CoreType == ECoreType.Xray)
+            else if (item.CoreType is ECoreType.Xray or ECoreType.sing_box)
             {
                 await CheckUpdateCore(item, EnableCheckPreReleaseUpdate);
             }