diff --git a/src/main/java/im/rosetta/packet/Packet6Message.java b/src/main/java/im/rosetta/packet/Packet6Message.java
index a573aab..07ee9ab 100644
--- a/src/main/java/im/rosetta/packet/Packet6Message.java
+++ b/src/main/java/im/rosetta/packet/Packet6Message.java
@@ -4,7 +4,6 @@ import java.util.List;
 
 import im.rosetta.packet.base.PacketBaseDialog;
 import im.rosetta.packet.runtime.Attachment;
-import im.rosetta.packet.runtime.AttachmentEncoding;
 import im.rosetta.packet.runtime.AttachmentTransport;
 import im.rosetta.packet.runtime.AttachmentType;
 
@@ -63,10 +62,7 @@ public class Packet6Message extends PacketBaseDialog {
             String transportTag = stream.readString();
             String transportServer = stream.readString();
             AttachmentTransport transport = new AttachmentTransport(transportTag, transportServer);
-            String encodedFor = stream.readString();
-            String encoder = stream.readString();
-            AttachmentEncoding encoding = new AttachmentEncoding(encoder, encodedFor);
-            this.attachments.add(new Attachment(id, blob, type, preview, encoding, transport));
+            this.attachments.add(new Attachment(id, blob, type, preview, transport));
         }
         this.aesChachaKey = stream.readString();
     }
@@ -90,8 +86,6 @@ public class Packet6Message extends PacketBaseDialog {
             stream.writeInt8((byte) attachment.getType().getCode());
             stream.writeString(attachment.getTransport().getTransportTag());
             stream.writeString(attachment.getTransport().getTransportServer());
-            stream.writeString(attachment.getEncoding().getEncoder());
-            stream.writeString(attachment.getEncoding().getEncodedFor());
         }
         stream.writeString(this.aesChachaKey);
         return stream;
diff --git a/src/main/java/im/rosetta/packet/runtime/Attachment.java b/src/main/java/im/rosetta/packet/runtime/Attachment.java
index 482d6c9..8f1355c 100644
--- a/src/main/java/im/rosetta/packet/runtime/Attachment.java
+++ b/src/main/java/im/rosetta/packet/runtime/Attachment.java
@@ -9,15 +9,13 @@ public class Attachment {
     private String blob;
     private AttachmentType type;
     private String preview;
-    private AttachmentEncoding encoding;
     private AttachmentTransport transport;
 
-    public Attachment(String id, String blob, AttachmentType type, String preview, AttachmentEncoding encoding, AttachmentTransport transport) {
+    public Attachment(String id, String blob, AttachmentType type, String preview, AttachmentTransport transport) {
         this.id = id;
         this.blob = blob;
         this.type = type;
         this.preview = preview;
-        this.encoding = encoding;
         this.transport = transport;
     }
 
@@ -53,14 +51,6 @@ public class Attachment {
         return preview;
     }
 
-    /**
-     * Получить информацию о том, как было закодировано вложение
-     * @return
-     */
-    public AttachmentEncoding getEncoding() {
-        return encoding;
-    }
-
     /**
      * Получить информацию о том, как доставлять вложение
      * @return
diff --git a/src/main/java/im/rosetta/packet/runtime/AttachmentEncoding.java b/src/main/java/im/rosetta/packet/runtime/AttachmentEncoding.java
deleted file mode 100644
index 9737754..0000000
--- a/src/main/java/im/rosetta/packet/runtime/AttachmentEncoding.java
+++ /dev/null
@@ -1,24 +0,0 @@
-package im.rosetta.packet.runtime;
-
-/**
- * Класс для хранения информации о том, как было закодировано вложение в сообщении
- */
-public class AttachmentEncoding {
-
-    private String encoder;
-    private String encodedFor;
-
-    public AttachmentEncoding(String encoder, String encodedFor) {
-        this.encoder = encoder;
-        this.encodedFor = encodedFor;
-    }
-
-    public String getEncoder() {
-        return encoder;
-    }
-
-    public String getEncodedFor() {
-        return encodedFor;
-    }
-
-}