diff --git a/src/main/java/im/rosetta/packet/runtime/AttachmentType.java b/src/main/java/im/rosetta/packet/runtime/AttachmentType.java
index e05a8a0..b739045 100644
--- a/src/main/java/im/rosetta/packet/runtime/AttachmentType.java
+++ b/src/main/java/im/rosetta/packet/runtime/AttachmentType.java
@@ -8,7 +8,8 @@ public enum AttachmentType {
     MESSAGES(1),
     FILE(2),
     AVATAR(3),
-    CALL(4);
+    CALL(4),
+    VOICE(5);
 
 
     private final int code;