diff --git a/src/Discord/WebSockets/Op.php b/src/Discord/WebSockets/Op.php
index 5e315b649..8abe5461d 100644
--- a/src/Discord/WebSockets/Op.php
+++ b/src/Discord/WebSockets/Op.php
@@ -54,6 +54,9 @@ class Op
     public const OP_HELLO = 10;
     /** Used to acknowledge heartbeats. */
     public const OP_HEARTBEAT_ACK = 11;
+    /** Request soundboard sounds. */
+    public const REQUEST_SOUNDBOARD_SOUNDS = 31;
+
 
     /**
      * Voice Opcodes.
@@ -83,11 +86,32 @@ class Op
     public const VOICE_HELLO = 8;
     /** Acknowledge a successful session resume. */
     public const VOICE_RESUMED = 9;
+    /** One or more clients have connected to the voice channel */
+    public const VOICE_CLIENT_CONNECT = 11;
     /** A client has disconnected from the voice channel. */
     public const VOICE_CLIENT_DISCONNECT = 13;
-
-    /** Request soundboard sounds. */
-    public const REQUEST_SOUNDBOARD_SOUNDS = 31;
+    /** A downgrade from the DAVE protocol is upcoming. */
+    public const VOICE_DAVE_PREPARE_TRANSITION = 21;
+    /** Execute a previously announced protocol transition. */
+    public const VOICE_DAVE_EXECUTE_TRANSITION = 22;
+    /** Acknowledge readiness previously announced transition. */
+    public const VOICE_DAVE_TRANSITION_READY = 23;
+    /** A DAVE protocol version or group change is upcoming. */
+    public const VOICE_DAVE_PREPARE_EPOCH = 24;
+    /** Credential and public key for MLS external sender. */
+    public const VOICE_DAVE_MLS_EXTERNAL_SENDER = 25;
+    /** MLS Key Package for pending group member. */
+    public const VOICE_DAVE_MLS_KEY_PACKAGE = 26;
+    /** MLS Proposals to be appended or revoked. */
+    public const VOICE_DAVE_MLS_PROPOSALS = 27;
+    /** MLS Commit with optional MLS Welcome messages. */
+    public const VOICE_DAVE_MLS_COMMIT_WELCOME = 28;
+    /** MLS Commit to be processed for upcoming transition. */
+    public const VOICE_DAVE_MLS_ANNOUNCE_COMMIT_TRANSITION = 29;
+    /** MLS Welcome to group for upcoming transition. */
+    public const VOICE_DAVE_MLS_WELCOME = 30;
+    /** Flag invalid commit or welcome, request re-add */
+    public const VOICE_DAVE_MLS_INVALID_COMMIT_WELCOME = 31;
 
     /**
      * Gateway Close Event Codes.