diff --git a/src/engine/identification.md b/src/engine/identification.md
index 7898c75a..11f1d2db 100644
--- a/src/engine/identification.md
+++ b/src/engine/identification.md
@@ -7,15 +7,17 @@ Engine API structures and methods specified for client version specification.
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
-- [Client Version Specification](#client-version-specification)
-- [Structures](#structures)
-  - [ClientCode](#clientcode)
-  - [ClientVersionV1](#clientversionv1)
-- [Methods](#methods)
-  - [engine_getClientVersionV1](#engine_getclientversionv1)
-    - [Request](#request)
-    - [Response](#response)
-    - [Specification](#specification)
+- [Engine API -- Client Version Specification](#engine-api----client-version-specification)
+  - [Table of contents](#table-of-contents)
+  - [Client Version Specification](#client-version-specification)
+  - [Structures](#structures)
+    - [ClientCode](#clientcode)
+    - [ClientVersionV1](#clientversionv1)
+  - [Methods](#methods)
+    - [engine\_getClientVersionV1](#engine_getclientversionv1)
+      - [Request](#request)
+      - [Response](#response)
+      - [Specification](#specification)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
@@ -38,6 +40,7 @@ This enum defines a standard for specifying a client with just two letters. Clie
  - `LS`: lodestar
  - `NM`: nethermind
  - `NB`: nimbus
+ - `TE`: trin-execution
  - `TK`: teku
  - `PM`: prysm
  - `RH`: reth