diff --git a/Endpoint/Program.cs b/Endpoint/Program.cs
index bebb589..06fc830 100644
--- a/Endpoint/Program.cs
+++ b/Endpoint/Program.cs
@@ -79,7 +79,7 @@ public class Program
 
             if (string.IsNullOrEmpty(secretForward!.SecretForwardToken))
             {
-                secretForward.SecretForwardToken = GeneratorKey.GenerateBase64(18);
+                secretForward.SecretForwardToken = GeneratorKey.GenerateAlphaNumeric(16);
                 secretForward.SaveSetting();
             }
 
diff --git a/Security/Services/GeneratorKey.cs b/Security/Services/GeneratorKey.cs
index 79a0430..b71bfab 100644
--- a/Security/Services/GeneratorKey.cs
+++ b/Security/Services/GeneratorKey.cs
@@ -1,11 +1,30 @@
 using System;
 using System.Buffers.Text;
+using System.Linq;
 using System.Text;
 
 namespace Mirea.Api.Security.Services;
 
 public static class GeneratorKey
 {
+    public static string GenerateAlphaNumeric(int size, string? excludes = null, string? includes = null)
+    {
+        var random = new Random();
+        const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+
+        string charsForGenerate = excludes?
+            .Aggregate(chars, (current, ex) => current.Replace(ex.ToString(), string.Empty)) ?? chars;
+
+        if (!string.IsNullOrEmpty(includes))
+            charsForGenerate = includes
+                .Aggregate(charsForGenerate, (current, include) =>
+                    current.Contains(include) ? current : current + include);
+
+        return new string(Enumerable.Repeat(charsForGenerate, size)
+            .Select(s => s[random.Next(s.Length)])
+            .ToArray());
+    }
+
     public static ReadOnlySpan<byte> GenerateBytes(int size)
     {
         var key = new byte[size];