diff --git a/README.md b/README.md
index 16585c8..6a97234 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,4 @@
 - **string_utils** — String manipulation utilities: slugify, truncate, case conversion (snake_case, camelCase, PascalCase), and more.
 - **math_utils** — Math utilities: clamp, lerp, safe_divide, remap, and more.
 - **collection_utils** — Collection utilities: chunk, flatten, unique_by, group_by, partition, compact.
-- **constants** — Package-level constants (DEFAULT_HELLO_TARGET, DEFAULT_FAREWELL, DEFAULT_LANGUAGE, DEFAULT_REGION).
+- **constants** — Package-level constants (DEFAULT_HELLO_TARGET, DEFAULT_FAREWELL, DEFAULT_LANGUAGE, DEFAULT_REGION, DEFAULT_CURRENCY).
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index a11cd75..d628f09 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file.
 
+## v008 (2026-05-17)
+
+- **BL-023:** Add DEFAULT_CURRENCY constant to constants module
+  - Add `DEFAULT_CURRENCY: str = "usd"` to `src/test_target_2/constants.py`
+  - Add `test_default_currency_value()` and `test_default_currency_type()` to `tests/test_constants.py`
+  - All quality gates pass (ruff, mypy --strict, pytest)
+
 ## [v007] - 2026-05-14
 
 ### Added