diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37ac4fc..e787c6b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Synced with the latest OpenAPI spec: `ListEmailsResponse` and
+  `ListProjectsResponse` no longer carry a top-level `success` flag;
+  `ErrorCode` gained `retrieval_error`, `insufficient_scope`, and
+  `schedule_cancellation_failed`; the webhook event-type typo
+  `engagament.*` was corrected to `engagement.*`. No SDK behavior
+  change — `error_code` values and webhook `events` strings continue
+  to accept any value, so callers don't need to update their code.
+
 ### Fixed
 - `emails.list()`, `emails.get()`, and `emails.list_events()` were reading
   responses at the wrong nesting level and silently returned empty results
diff --git a/tests/__pycache__/test_emails.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_emails.cpython-313-pytest-9.0.3.pyc
index 5938851..e667ee6 100644
Binary files a/tests/__pycache__/test_emails.cpython-313-pytest-9.0.3.pyc and b/tests/__pycache__/test_emails.cpython-313-pytest-9.0.3.pyc differ
diff --git a/tests/test_emails.py b/tests/test_emails.py
index 9fe35c6..afd97b6 100644
--- a/tests/test_emails.py
+++ b/tests/test_emails.py
@@ -168,7 +168,6 @@ def test_list_regression_nested_events_wrapper(
         empty list when the API actually had emails.
         """
         mock_client.get.return_value = {
-            "success": True,
             "message": "Emails retrieved successfully.",
             "data": {
                 "events": {