diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3e79ff..860a677 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,10 +2,16 @@
 
 ### 0.17.0
 
-- feat: Add support for Postgres sqlbody functions.
-
 ## 0.16
 
+### 0.16.6
+
+- fix: postgresql parsing of existing function defaults.
+
+### 0.16.5
+
+- feat: Add support for Postgres sqlbody functions.
+
 ### 0.16.4
 
 - fix: Handle unnamed parameters during normalization and CREATE statements.
diff --git a/pyproject.toml b/pyproject.toml
index 7059c27..1f6499e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,39 +1,33 @@
 [project]
 name = "sqlalchemy-declarative-extensions"
-version = "0.16.5"
-authors = [
-    {name = "Dan Cardin", email = "ddcardin@gmail.com"},
-]
+version = "0.16.6"
+authors = [{ name = "Dan Cardin", email = "ddcardin@gmail.com" }]
 description = "Library to declare additional kinds of objects not natively supported by SQLAlchemy/Alembic."
-license = {file = "LICENSE"}
+license = { file = "LICENSE" }
 readme = 'README.md'
 
 keywords = [
-  "sqlalchemy",
-  "alembic",
-  "declarative",
-
-  "mysql",
-  "postgresql",
-  "snowflake",
-  "sqlite",
-
-  "schema",
-  "role",
-  "grant",
-  "view",
-  "function",
-  "trigger",
-]
-classifiers = [
-  "Topic :: Software Development :: Libraries :: Python Modules",
+    "sqlalchemy",
+    "alembic",
+    "declarative",
+
+    "mysql",
+    "postgresql",
+    "snowflake",
+    "sqlite",
+
+    "schema",
+    "role",
+    "grant",
+    "view",
+    "function",
+    "trigger",
 ]
+classifiers = ["Topic :: Software Development :: Libraries :: Python Modules"]
 
 requires-python = ">=3.8,<4"
 
-dependencies = [
-  "sqlalchemy >= 1.3",
-]
+dependencies = ["sqlalchemy >= 1.3"]
 
 [project.urls]
 documentation = "https://sqlalchemy-declarative-extensions.readthedocs.io/en/latest/"
@@ -47,23 +41,23 @@ parse = ["sqlglot"]
 
 [dependency-groups]
 dev = [
-  "alembic-utils >= 0.8.1",
-  "coverage >= 5",
-  "mypy == 1.8.0",
-  "pymysql[rsa]",
-  "pytest >= 7",
-  "pytest-alembic",
-  "pytest-mock-resources[docker] >= 2.6.13",
-  "pytest-xdist",
-  "ruff >= 0.5.0",
-  "sqlalchemy[mypy] >= 1.4",
-  "psycopg[binary]",
-  "psycopg2-binary",
-
-  # snowflake
-  "fakesnow >= 0.9.21; python_version >= '3.9'",
-  "snowflake-connector-python >= 3.7; python_version >= '3.9'",
-  "snowflake-sqlalchemy >= 1.6.0; python_version >= '3.9'",
+    "alembic-utils >= 0.8.1",
+    "coverage >= 5",
+    "mypy == 1.8.0",
+    "pymysql[rsa]",
+    "pytest >= 7",
+    "pytest-alembic",
+    "pytest-mock-resources[docker] >= 2.6.13",
+    "pytest-xdist",
+    "ruff >= 0.5.0",
+    "sqlalchemy[mypy] >= 1.4",
+    "psycopg[binary]",
+    "psycopg2-binary",
+
+    # snowflake
+    "fakesnow >= 0.9.21; python_version >= '3.9'",
+    "snowflake-connector-python >= 3.7; python_version >= '3.9'",
+    "snowflake-sqlalchemy >= 1.6.0; python_version >= '3.9'",
 ]
 
 [tool.uv]
@@ -81,11 +75,7 @@ exclude = "tests/examples"
 [tool.coverage.report]
 show_missing = true
 skip_covered = true
-exclude_lines = [
-  "pragma: no cover",
-  "if TYPE_CHECKING:",
-  "if __name__ == .__main__.:",
-]
+exclude_lines = ["pragma: no cover", "if TYPE_CHECKING:", "if __name__ == .__main__.:"]
 
 [tool.coverage.run]
 include = ["src/*"]
@@ -97,22 +87,16 @@ doctest_optionflags = "NORMALIZE_WHITESPACE IGNORE_EXCEPTION_DETAIL ELLIPSIS"
 addopts = "--doctest-modules -vv --ff --strict-markers"
 norecursedirs = ".* build dist *.egg bin tests/examples --junitxml=junit.xml"
 filterwarnings = [
-  'error',
-  'ignore:invalid escape sequence.*',
-  'ignore:distutils Version classes are deprecated. Use packaging.version instead.:DeprecationWarning',
-  'ignore:_SixMetaPathImporter.find_spec.*:ImportWarning',
-  'ignore:`ignore_views` is deprecated, use `ignore` instead:DeprecationWarning',
-  'ignore:The GenericFunction.*:sqlalchemy.exc.SAWarning',
-  'ignore:Did not recognize type.*:sqlalchemy.exc.SAWarning',
+    'error',
+    'ignore:invalid escape sequence.*',
+    'ignore:distutils Version classes are deprecated. Use packaging.version instead.:DeprecationWarning',
+    'ignore:_SixMetaPathImporter.find_spec.*:ImportWarning',
+    'ignore:`ignore_views` is deprecated, use `ignore` instead:DeprecationWarning',
+    'ignore:The GenericFunction.*:sqlalchemy.exc.SAWarning',
+    'ignore:Did not recognize type.*:sqlalchemy.exc.SAWarning',
 ]
 pytester_example_dir = "tests/examples"
-markers = [
-    'grant',
-    'schema',
-    'role',
-    'row',
-    'alembic',
-]
+markers = ['grant', 'schema', 'role', 'row', 'alembic']
 pmr_multiprocess_safe = true
 log_level = 'WARNING'
 log_cli_level = 'WARNING'
@@ -125,21 +109,7 @@ target-version = "py37"
 select = ["C", "D", "E", "F", "I", "N", "Q", "RET", "RUF", "S", "T", "UP", "YTT"]
 ignore = ["C901", "E501", "S101"]
 extend-select = ["D"]
-extend-ignore = [
-    "D1",
-
-    "D203",
-    "D204",
-    "D213",
-    "D215",
-    "D400",
-    "D404",
-    "D406",
-    "D407",
-    "D408",
-    "D409",
-    "D413",
-]
+extend-ignore = ["D1", "D203", "D204", "D213", "D215", "D400", "D404", "D406", "D407", "D408", "D409", "D413"]
 
 [tool.ruff.lint.isort]
 known-first-party = ["sqlalchemy_declarative_extensions", "tests"]