diff --git a/CHANGELOG.md b/CHANGELOG.md
index caf3cc9..876a4b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Downgraded `eslint` from `^10` to `^9` in the frontend to resolve `TypeError: contextOrFilename.getFilename is not a function` caused by ESLint 10 removing the `getFilename()` API used by `eslint-plugin-react` bundled in `eslint-config-next`
+- Upgraded `sqlalchemy` from `2.0.25` to `2.0.48` to fix `AssertionError: Class ... directly inherits TypingOnly but has additional attributes` on Python 3.14 (`__static_attributes__`, `__firstlineno__`)
 
 ### Added
 - **Database-backed configuration**: `AppSetting` model and `ConfigService` for hybrid config (DB-first, env-var fallback)
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 2fbedc6..3510b4d 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -5,7 +5,7 @@ pydantic==2.12.5
 pydantic-settings==2.13.1
 
 # Database
-sqlalchemy==2.0.25
+sqlalchemy==2.0.48  # Updated: Fixed Python 3.14 incompatibility with TypingOnly assertion (was 2.0.25)
 alembic==1.13.1
 psycopg2-binary==2.9.11
 asyncpg==0.31.0
diff --git a/docs/TODO.md b/docs/TODO.md
index 5059d6a..7f623ab 100644
--- a/docs/TODO.md
+++ b/docs/TODO.md
@@ -96,6 +96,7 @@ Comprehensive task breakdown for repository improvements and production readines
 - [x] Set up automatic dependency updates (Dependabot)
 - [x] Merge Dependabot dependency updates (PRs #26–#49)
 - [x] Remove CodeQL checks from CI (was blocking builds)
+- [x] Upgrade SQLAlchemy to 2.0.48 to fix Python 3.14 test failures
 
 ### In Progress 🔨
 - [ ] Configure branch protection rules