diff --git a/v2rayN/v2rayN/Global.cs b/v2rayN/v2rayN/Global.cs
index 12b478e0..ed6d0673 100644
--- a/v2rayN/v2rayN/Global.cs
+++ b/v2rayN/v2rayN/Global.cs
@@ -3,6 +3,8 @@
     class Global
     {
         #region const
+        public const string githubUrl = "https://github.com";
+        public const string githubApiUrl = "https://api.github.com/repos";
         public const string v2rayWebsiteUrl = @"https://www.v2fly.org/";
         public const string AboutUrl = @"https://github.com/2dust/v2rayN";
         public const string UpdateUrl = AboutUrl + @"/releases";
diff --git a/v2rayN/v2rayN/Handler/LazyConfig.cs b/v2rayN/v2rayN/Handler/LazyConfig.cs
index f53e72b2..20bc299d 100644
--- a/v2rayN/v2rayN/Handler/LazyConfig.cs
+++ b/v2rayN/v2rayN/Handler/LazyConfig.cs
@@ -209,7 +209,7 @@ namespace v2rayN.Handler
             {
                 coreType = ECoreType.v2rayN,
                 coreUrl = Global.NUrl,
-                coreReleaseApiUrl = Global.NUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.NUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.NUrl + "/download/{0}/v2rayN.zip",
                 coreDownloadUrl64 = Global.NUrl + "/download/{0}/v2rayN.zip",
             });
@@ -220,7 +220,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "wv2ray", "v2ray" },
                 arguments = "",
                 coreUrl = Global.v2flyCoreUrl,
-                coreReleaseApiUrl = Global.v2flyCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.v2flyCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.v2flyCoreUrl + "/download/{0}/v2ray-windows-{1}.zip",
                 coreDownloadUrl64 = Global.v2flyCoreUrl + "/download/{0}/v2ray-windows-{1}.zip",
                 match = "V2Ray",
@@ -234,7 +234,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "SagerNet", "v2ray" },
                 arguments = "run",
                 coreUrl = Global.SagerNetCoreUrl,
-                coreReleaseApiUrl = Global.SagerNetCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.SagerNetCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.SagerNetCoreUrl + "/download/{0}/v2ray-windows-{1}.zip",
                 coreDownloadUrl64 = Global.SagerNetCoreUrl + "/download/{0}/v2ray-windows-{1}.zip",
                 match = "V2Ray",
@@ -248,7 +248,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "v2ray" },
                 arguments = "run",
                 coreUrl = Global.v2flyCoreUrl,
-                coreReleaseApiUrl = Global.v2flyCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.v2flyCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.v2flyCoreUrl + "/download/{0}/v2ray-windows-{1}.zip",
                 coreDownloadUrl64 = Global.v2flyCoreUrl + "/download/{0}/v2ray-windows-{1}.zip",
                 match = "V2Ray",
@@ -262,7 +262,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "xray", "wxray" },
                 arguments = "",
                 coreUrl = Global.xrayCoreUrl,
-                coreReleaseApiUrl = Global.xrayCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.xrayCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.xrayCoreUrl + "/download/{0}/Xray-windows-{1}.zip",
                 coreDownloadUrl64 = Global.xrayCoreUrl + "/download/{0}/Xray-windows-{1}.zip",
                 match = "Xray",
@@ -276,7 +276,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "clash-windows-amd64-v3", "clash-windows-amd64", "clash-windows-386", "clash" },
                 arguments = "-f config.json",
                 coreUrl = Global.clashCoreUrl,
-                coreReleaseApiUrl = Global.clashCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.clashCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.clashCoreUrl + "/download/{0}/clash-windows-386-{0}.zip",
                 coreDownloadUrl64 = Global.clashCoreUrl + "/download/{0}/clash-windows-amd64-{0}.zip",
                 match = "v",
@@ -290,7 +290,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "Clash.Meta-windows-amd64-compatible", "Clash.Meta-windows-amd64", "Clash.Meta-windows-386", "Clash.Meta", "clash" },
                 arguments = "-f config.json",
                 coreUrl = Global.clashMetaCoreUrl,
-                coreReleaseApiUrl = Global.clashMetaCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.clashMetaCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.clashMetaCoreUrl + "/download/{0}/Clash.Meta-windows-386-{0}.zip",
                 coreDownloadUrl64 = Global.clashMetaCoreUrl + "/download/{0}/Clash.Meta-windows-amd64-compatible-{0}.zip",
                 match = "v",
@@ -304,7 +304,7 @@ namespace v2rayN.Handler
                 coreExes = new List<string> { "hysteria-windows-amd64", "hysteria-windows-386", "hysteria" },
                 arguments = "",
                 coreUrl = Global.hysteriaCoreUrl,
-                coreReleaseApiUrl = Global.hysteriaCoreUrl.Replace(@"https://github.com", @"https://api.github.com/repos"),
+                coreReleaseApiUrl = Global.hysteriaCoreUrl.Replace(Global.githubUrl, Global.githubApiUrl),
                 coreDownloadUrl32 = Global.hysteriaCoreUrl + "/download/{0}/hysteria-windows-386.exe",
                 coreDownloadUrl64 = Global.hysteriaCoreUrl + "/download/{0}/hysteria-windows-amd64.exe",
                 redirectInfo = true,