diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6869108..5c79478a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,7 +23,7 @@ v6.0.0 is the first stable release of the v6 line. The Management API client is
 - List methods return paginated iterators instead of arrays
 - Non-2xx responses raise typed exceptions (`Auth0::Errors::NotFoundError`, etc.) instead of returning error hashes
 - The `api_version` parameter has been removed (v6 supports Management API v2 only)
-- `rest-client` dependency removed; uses `net/http` internally
+- Management API client uses `net/http` internally. The Authentication API still uses `rest-client`
 - Minimum Ruby version raised to 3.3
 
 **Added**
@@ -109,7 +109,7 @@ This beta release completely rewrites the Management API client using [Fern](htt
 - API methods return strongly-typed response objects instead of raw hashes
 - List methods return paginated iterators instead of arrays
 - Non-2xx responses raise typed exceptions (`Auth0::Errors::NotFoundError`, etc.) instead of returning error hashes
-- `rest-client` dependency removed; uses `net/http` internally
+- Management API client uses `net/http` internally. The Authentication API still uses `rest-client`
 - Minimum Ruby version raised to 3.3
 
 **Added**
diff --git a/lib/auth0/mixins/headers.rb b/lib/auth0/mixins/headers.rb
index 569fbdd7..772c0910 100644
--- a/lib/auth0/mixins/headers.rb
+++ b/lib/auth0/mixins/headers.rb
@@ -1,4 +1,5 @@
 require 'json'
+require_relative '../version'
 
 module Auth0
   module Mixins