diff --git a/DTLib b/DTLib
index 3ebb5be..e7769a3 160000
--- a/DTLib
+++ b/DTLib
@@ -1 +1 @@
-Subproject commit 3ebb5be5819fa46d36705a5752aecd885c406a8b
+Subproject commit e7769a3e0ff8788b5a476c7a9c797f2d6097ad89
diff --git a/VkAudioDownloader.CLI/Program.cs b/VkAudioDownloader.CLI/Program.cs
index 31f952f..621ff79 100644
--- a/VkAudioDownloader.CLI/Program.cs
+++ b/VkAudioDownloader.CLI/Program.cs
@@ -22,7 +22,7 @@ _logger.LogDebug("DEBUG LOG ENABLED");
 try
 {
 #if DEBUG
-    AudioAesDecryptor.TestAes();
+    VkAudioDownloader.Helpers.AudioAesDecryptor.TestAes();
 #endif
     
     _logger.LogInfo("initializing api...");
diff --git a/VkAudioDownloader/AudioHelper.cs b/VkAudioDownloader/ExtensionMethods.cs
similarity index 86%
rename from VkAudioDownloader/AudioHelper.cs
rename to VkAudioDownloader/ExtensionMethods.cs
index e8afe2a..6b20e79 100644
--- a/VkAudioDownloader/AudioHelper.cs
+++ b/VkAudioDownloader/ExtensionMethods.cs
@@ -3,7 +3,7 @@ using VkNet.Model.Attachments;
 
 namespace VkAudioDownloader;
 
-public static class AudioHelper
+public static class ExtensionMethods
 {
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static string AudioToString(this Audio a)
diff --git a/VkAudioDownloader/AudioAesDecryptor.cs b/VkAudioDownloader/Helpers/AudioAesDecryptor.cs
similarity index 95%
rename from VkAudioDownloader/AudioAesDecryptor.cs
rename to VkAudioDownloader/Helpers/AudioAesDecryptor.cs
index c3f3ef6..c7695b4 100644
--- a/VkAudioDownloader/AudioAesDecryptor.cs
+++ b/VkAudioDownloader/Helpers/AudioAesDecryptor.cs
@@ -1,7 +1,7 @@
 using System.Security.Cryptography;
 using Stream = System.IO.Stream;
 
-namespace VkAudioDownloader;
+namespace VkAudioDownloader.Helpers;
 
 public class AudioAesDecryptor : IDisposable
 {
diff --git a/VkAudioDownloader/FFMPegHelper.cs b/VkAudioDownloader/Helpers/FFMPegHelper.cs
similarity index 96%
rename from VkAudioDownloader/FFMPegHelper.cs
rename to VkAudioDownloader/Helpers/FFMPegHelper.cs
index 9a8ac05..e3fd2f2 100644
--- a/VkAudioDownloader/FFMPegHelper.cs
+++ b/VkAudioDownloader/Helpers/FFMPegHelper.cs
@@ -1,6 +1,6 @@
 using CliWrap;
 
-namespace VkAudioDownloader;
+namespace VkAudioDownloader.Helpers;
 
 public class FFMPegHelper
 {
diff --git a/VkAudioDownloader/HttpHelper.cs b/VkAudioDownloader/Helpers/HttpHelper.cs
similarity index 94%
rename from VkAudioDownloader/HttpHelper.cs
rename to VkAudioDownloader/Helpers/HttpHelper.cs
index be246aa..ff5d15c 100644
--- a/VkAudioDownloader/HttpHelper.cs
+++ b/VkAudioDownloader/Helpers/HttpHelper.cs
@@ -3,7 +3,7 @@ using VkAudioDownloader.VkM3U8;
 using Stream = System.IO.Stream;
 
 
-namespace VkAudioDownloader;
+namespace VkAudioDownloader.Helpers;
 
 public class HttpHelper : HttpClient
 {
diff --git a/VkAudioDownloader/VkClient.cs b/VkAudioDownloader/VkClient.cs
index 8b306f5..6877c3f 100644
--- a/VkAudioDownloader/VkClient.cs
+++ b/VkAudioDownloader/VkClient.cs
@@ -7,6 +7,7 @@ global using DTLib.Logging.New;
 using DTLib.Logging.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
+using VkAudioDownloader.Helpers;
 using VkNet;
 using VkNet.Enums.Filters;
 using VkNet.Model;