diff --git a/Requests/CreateTTSUser.cs b/Requests/CreateTTSUser.cs
index a4fdf58..f33686f 100644
--- a/Requests/CreateTTSUser.cs
+++ b/Requests/CreateTTSUser.cs
@@ -27,16 +27,25 @@ namespace HermesSocketServer.Requests
 
             if (long.TryParse(data["chatter"].ToString(), out long chatter))
                 data["chatter"] = chatter;
+            else
+                return new RequestResult(false, "Invalid Twitch user id");
+            
             if (data["voice"] is JsonElement v)
                 data["voice"] = v.ToString();
+            else
+                return new RequestResult(false, "Invalid voice id");
+            
             data["user"] = sender;
 
             var check = await _database.ExecuteScalar("SELECT state FROM \"TtsVoiceState\" WHERE \"userId\" = @user AND \"ttsVoiceId\" = @voice", data) ?? false;
             if (check is not bool state || !state)
-                return new RequestResult(false, null);
+                return new RequestResult(false, "Voice is disabled on this channel.");
 
             string sql = "INSERT INTO \"TtsChatVoice\" (\"userId\", \"chatterId\", \"ttsVoiceId\") VALUES (@user, @chatter, @voice)";
             var result = await _database.Execute(sql, data);
+            if (result == 0)
+                return new RequestResult(false, "Could not insert the user's voice properly.");
+            
             _logger.Information($"Selected a tts voice [voice: {data["voice"]}] for user [chatter: {data["chatter"]}] in channel [channel: {data["user"]}]");
             return new RequestResult(result == 1, null);
         }
diff --git a/Requests/CreateTTSVoice.cs b/Requests/CreateTTSVoice.cs
index 2768a3d..7e70c61 100644
--- a/Requests/CreateTTSVoice.cs
+++ b/Requests/CreateTTSVoice.cs
@@ -1,6 +1,6 @@
 using System.Text.Json;
-using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
 namespace HermesSocketServer.Requests
@@ -8,13 +8,13 @@ namespace HermesSocketServer.Requests
     public class CreateTTSVoice : IRequest
     {
         public string Name => "create_tts_voice";
-        private Database _database;
+        private IStore<string, string> _voices;
         private ILogger _logger;
         private Random _random;
 
-        public CreateTTSVoice(Database database, ILogger logger)
+        public CreateTTSVoice(VoiceStore voices, ILogger logger)
         {
-            _database = database;
+            _voices = voices;
             _logger = logger;
             _random = new Random();
         }
@@ -28,18 +28,17 @@ namespace HermesSocketServer.Requests
                 return new RequestResult(false, null);
             }
 
-            string id = RandomString(25);
-            data.Add("idd", id);
-
             if (data["voice"] is JsonElement v)
                 data["voice"] = v.ToString();
+            else
+                return new RequestResult(false, "Invalid voice name.");
 
-            string sql = "INSERT INTO \"TtsVoice\" (id, name) VALUES (@idd, @voice)";
-            var result = await _database.Execute(sql, data);
-            _logger.Information($"Added a new voice [voice: {data["voice"]}][voice id: {data["idd"]}]");
+            string id = RandomString(25);
 
-            data.Remove("idd");
-            return new RequestResult(result == 1, id);
+            _voices.Set(id, data["voice"].ToString());
+            _logger.Information($"Added a new voice [voice: {data["voice"]}][voice id: {id}]");
+
+            return new RequestResult(true, id);
         }
 
         private string RandomString(int length)
diff --git a/Requests/DeleteTTSVoice.cs b/Requests/DeleteTTSVoice.cs
index 87f7edf..db037bd 100644
--- a/Requests/DeleteTTSVoice.cs
+++ b/Requests/DeleteTTSVoice.cs
@@ -1,6 +1,6 @@
 using System.Text.Json;
-using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
 namespace HermesSocketServer.Requests
@@ -8,12 +8,12 @@ namespace HermesSocketServer.Requests
     public class DeleteTTSVoice : IRequest
     {
         public string Name => "delete_tts_voice";
-        private Database _database;
+        private IStore<string, string> _voices;
         private ILogger _logger;
 
-        public DeleteTTSVoice(Database database, ILogger logger)
+        public DeleteTTSVoice(VoiceStore voices, ILogger logger)
         {
-            _database = database;
+            _voices = voices;
             _logger = logger;
         }
 
@@ -28,10 +28,9 @@ namespace HermesSocketServer.Requests
             if (data["voice"] is JsonElement v)
                 data["voice"] = v.ToString();
 
-            string sql = "DELETE FROM \"TtsVoice\" WHERE id = @voice";
-            var result = await _database.Execute(sql, data);
+            _voices.Remove(data["voice"].ToString());
             _logger.Information($"Deleted a voice by id [voice id: {data["voice"]}]");
-            return new RequestResult(result == 1, null);
+            return new RequestResult(true, null);
         }
     }
 }
\ No newline at end of file
diff --git a/Requests/UpdateTTSVoice.cs b/Requests/UpdateTTSVoice.cs
index 4672888..357b979 100644
--- a/Requests/UpdateTTSVoice.cs
+++ b/Requests/UpdateTTSVoice.cs
@@ -1,6 +1,6 @@
 using System.Text.Json;
-using HermesSocketLibrary.db;
 using HermesSocketLibrary.Requests;
+using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
 
 namespace HermesSocketServer.Requests
@@ -8,12 +8,12 @@ namespace HermesSocketServer.Requests
     public class UpdateTTSVoice : IRequest
     {
         public string Name => "update_tts_voice";
-        private Database _database;
+        private IStore<string, string> _voices;
         private ILogger _logger;
 
-        public UpdateTTSVoice(Database database, ILogger logger)
+        public UpdateTTSVoice(VoiceStore voices, ILogger logger)
         {
-            _database = database;
+            _voices = voices;
             _logger = logger;
         }
 
@@ -30,10 +30,9 @@ namespace HermesSocketServer.Requests
             if (data["voiceid"] is JsonElement id)
                 data["voiceid"] = id.ToString();
 
-            string sql = "UPDATE \"TtsVoice\" SET name = @voice WHERE id = @voiceid";
-            var result = await _database.Execute(sql, data);
+            _voices.Set(data["voiceid"].ToString(), data["voice"].ToString());
             _logger.Information($"Updated voice's [voice id: {data["voiceid"]}] name [new name: {data["voice"]}]");
-            return new RequestResult(result == 1, null);
+            return new RequestResult(true, null);
         }
     }
 }
\ No newline at end of file
diff --git a/db/Database.cs b/db/Database.cs
index 401ffc2..e8a2dc4 100644
--- a/db/Database.cs
+++ b/db/Database.cs
@@ -79,13 +79,13 @@ namespace HermesSocketLibrary.db
             }
         }
 
-        public async Task<int> Execute(string sql, Action<NpgsqlCommand> action)
+        public async Task<int> Execute(string sql, Action<NpgsqlCommand> prepare)
         {
             using (var connection = await _source.OpenConnectionAsync())
             {
                 using (var command = new NpgsqlCommand(sql, connection))
                 {
-                    action(command);
+                    prepare(command);
                     await command.PrepareAsync();
 
                     return await command.ExecuteNonQueryAsync();