diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1f07619..68d5cf4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.9.4] - 2026-01-04
+
+### Fixed
+
+- Fix SQLAlchemy async lazy loading error for new users in `/auth/sync`
+  - Initialize `user.roles = []` and `user.preferences` to avoid greenlet error
+  - Was causing "MissingGreenlet: greenlet_spawn has not been called" on new user creation
+
 ## [1.9.3] - 2026-01-04
 
 ### Fixed
diff --git a/pyproject.toml b/pyproject.toml
index f383d9d..94db214 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "core-api"
-version = "1.9.3"
+version = "1.9.4"
 description = "Core Code API - Infrastructure management and tools API"
 readme = "README.md"
 requires-python = ">=3.12"
diff --git a/src/domains/auth/service.py b/src/domains/auth/service.py
index f6fe454..2644488 100644
--- a/src/domains/auth/service.py
+++ b/src/domains/auth/service.py
@@ -130,11 +130,14 @@ class AuthService:
                 avatar_url=token_info.picture,
                 last_login=datetime.now(timezone.utc),
             )
+            # Initialize relationships to avoid lazy loading issues in async
+            user.roles = []
             self.session.add(user)
             await self.session.flush()  # Get the user ID
 
-            # Create default preferences
+            # Create default preferences and attach to user
             preferences = UserPreferences(user_id=user.id)
+            user.preferences = preferences
             self.session.add(preferences)
 
             logger.info(f"Created new user: {token_info.email}")