diff --git a/OpenHarbor.JwtTokenManager/ServiceCollectionExtensions.cs b/OpenHarbor.JwtTokenManager/ServiceCollectionExtensions.cs
index 611e9a9..9185392 100644
--- a/OpenHarbor.JwtTokenManager/ServiceCollectionExtensions.cs
+++ b/OpenHarbor.JwtTokenManager/ServiceCollectionExtensions.cs
@@ -10,34 +10,35 @@ namespace OpenHarbor.JwtTokenManager;
 
 public static class ServiceCollectionExtensions
 {
+  private static bool _defaultRegistered = false;
+  
   [RequiresDynamicCode("Not AoT safe signature. Will add one in the future.")]
   public static IServiceCollection AddJwtTokenManager(
     this IServiceCollection services,
     IConfiguration configuration,
     string sectionName,
-    Action<JwtTokenManagerBuilderOptions>? configureBuilderOptions = null)
+    string? name = null,
+    Action<JwtTokenManagerBuilderOptions>? configureBuilderOptions = null) 
   {
     if (configuration == null)
       throw new ArgumentNullException(nameof(configuration));
     if (string.IsNullOrWhiteSpace(sectionName))
       throw new ArgumentException("Section name must be provided.", nameof(sectionName));
-    
-    services.Configure<JwtTokenManagerOptions>(configuration.GetSection(sectionName));
 
-    // Apply the builder options
+    name ??= sectionName;
+
+    services.Configure<JwtTokenManagerOptions>(name, configuration.GetSection(sectionName));
+
     var builderOptions = new JwtTokenManagerBuilderOptions();
     configureBuilderOptions?.Invoke(builderOptions);
 
-    // Register the service
-    services.AddSingleton<IJwtTokenManagerService>(provider =>
+    services.AddKeyedSingleton<IJwtTokenManagerService>(name, (provider, key) =>
     {
       var optionsMonitor = provider.GetRequiredService<IOptionsMonitor<JwtTokenManagerOptions>>();
-      var options = optionsMonitor.Get(Options.DefaultName);
+      var options = optionsMonitor.Get(name);
 
-      // Apply additional configuration
       builderOptions.AdditionalConfiguration?.Invoke(options);
 
-      // Configure cache options
       var cacheOptions = new JwtTokenManagerCacheOptions();
       builderOptions.CacheOptions?.Invoke(cacheOptions);
 
@@ -48,6 +49,24 @@ public static class ServiceCollectionExtensions
       return new JwtTokenManagerService(options, httpClientFactory, logger, memoryCache, cacheOptions);
     });
 
+    if (!_defaultRegistered)
+    {
+      services.AddSingleton<IJwtTokenManagerService>(sp =>
+        sp.GetRequiredKeyedService<IJwtTokenManagerService>(name));
+
+      _defaultRegistered = true;
+    }
+
     return services;
   }
+  
+  [RequiresDynamicCode("Not AoT safe signature. Will add one in the future.")]
+  public static IServiceCollection AddJwtTokenManager(
+    this IServiceCollection services,
+    IConfiguration configuration,
+    string sectionName,
+    Action<JwtTokenManagerBuilderOptions>? configureBuilderOptions = null)
+  {
+    return AddJwtTokenManager(services, configuration, sectionName, null, configureBuilderOptions);
+  }
 }