diff --git a/NineChronicles.Headless.AccessControlCenter/AccessControlService/MutableRedisAccessControlService.cs b/NineChronicles.Headless.AccessControlCenter/AccessControlService/MutableRedisAccessControlService.cs
index c6fbf961d..eec152cd3 100644
--- a/NineChronicles.Headless.AccessControlCenter/AccessControlService/MutableRedisAccessControlService.cs
+++ b/NineChronicles.Headless.AccessControlCenter/AccessControlService/MutableRedisAccessControlService.cs
@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Linq;
-using StackExchange.Redis;
 using Libplanet.Crypto;
 using NineChronicles.Headless.Services;
 
@@ -27,7 +26,7 @@ public List<Address> ListBlockedAddresses(int offset, int limit)
         {
             var server = _db.Multiplexer.GetServer(_db.Multiplexer.GetEndPoints().First());
             var keys = server
-                .Keys(database: _db.Database, pattern: "*")
+                .Keys()
                 .Select(k => new Address(k.ToString()))
                 .ToList();
 
diff --git a/NineChronicles.Headless.AccessControlCenter/Configuration.cs b/NineChronicles.Headless.AccessControlCenter/Configuration.cs
index 6c35c9097..22ca923df 100644
--- a/NineChronicles.Headless.AccessControlCenter/Configuration.cs
+++ b/NineChronicles.Headless.AccessControlCenter/Configuration.cs
@@ -2,6 +2,8 @@ namespace NineChronicles.Headless.AccessControlCenter
 {
     public class Configuration
     {
+        public int Port { get; set; }
+
         public string AccessControlServiceType { get; set; } = null!;
 
         public string AccessControlServiceConnectionString { get; set; } = null!;
diff --git a/NineChronicles.Headless.AccessControlCenter/Controllers/AccessControlServiceController.cs b/NineChronicles.Headless.AccessControlCenter/Controllers/AccessControlServiceController.cs
index 84a5a5c2e..685dca35e 100644
--- a/NineChronicles.Headless.AccessControlCenter/Controllers/AccessControlServiceController.cs
+++ b/NineChronicles.Headless.AccessControlCenter/Controllers/AccessControlServiceController.cs
@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using Microsoft.AspNetCore.Mvc;
 using NineChronicles.Headless.AccessControlCenter.AccessControlService;
+using System.Linq;
 using Libplanet.Crypto;
 
 namespace NineChronicles.Headless.AccessControlCenter.Controllers
@@ -36,9 +37,12 @@ public ActionResult AllowAccess(string address)
         }
 
         [HttpGet("entries")]
-        public ActionResult<List<Address>> ListBlockedAddresses(int offset, int limit)
+        public ActionResult<List<string>> ListBlockedAddresses(int offset, int limit)
         {
-            return _accessControlService.ListBlockedAddresses(offset, limit);
+            return _accessControlService
+                .ListBlockedAddresses(offset, limit)
+                .Select(a => a.ToString())
+                .ToList();
         }
     }
 }
diff --git a/NineChronicles.Headless.AccessControlCenter/Program.cs b/NineChronicles.Headless.AccessControlCenter/Program.cs
index edf0377e0..a48cd2312 100644
--- a/NineChronicles.Headless.AccessControlCenter/Program.cs
+++ b/NineChronicles.Headless.AccessControlCenter/Program.cs
@@ -24,7 +24,7 @@ public static void Main(string[] args)
                 acsConfig.AccessControlServiceType,
                 acsConfig.AccessControlServiceConnectionString
             );
-            var hostBuilder = service.Configure(Host.CreateDefaultBuilder(), 31259);
+            var hostBuilder = service.Configure(Host.CreateDefaultBuilder(), acsConfig.Port);
             var host = hostBuilder.Build();
             host.Run();
         }
diff --git a/NineChronicles.Headless.AccessControlCenter/appsettings.json b/NineChronicles.Headless.AccessControlCenter/appsettings.json
index 3f6c4bb37..fbf1f5da2 100644
--- a/NineChronicles.Headless.AccessControlCenter/appsettings.json
+++ b/NineChronicles.Headless.AccessControlCenter/appsettings.json
@@ -1,4 +1,5 @@
 {
+    "Port": "31259",
     "AccessControlServiceType": "redis",
     "AccessControlServiceConnectionString": "localhost:6379"
 }