diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 780e84c..5d30b87 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14.0-rc.2"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
 
 
@@ -26,7 +26,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v5
         with:
-          version: "0.8.12"
+          version: "0.9.0"
       - name: Run ruff
         run: |
           uvx ruff check
@@ -39,12 +39,12 @@ jobs:
           uv build
       - name: Installing
         run: |
-          uv pip install dist/paramclasses-0.4.2.dev0-py3-none-any.whl
+          uv pip install dist/paramclasses-0.4.2-py3-none-any.whl
       - name: Run pytest with coverage
         run: |
           uv run pytest --cov-report=xml
-      - name: Upload coverage report to Codecov (Ubuntu, python3.13)
-        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.13'
+      - name: Upload coverage report to Codecov (Ubuntu, python3.14)
+        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.14'
         uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/README.md b/README.md
index 423b0c4..7749451 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 ![OS Independant](https://img.shields.io/badge/OS_Independant-%E2%9C%93-blue)
-[![python versions](https://img.shields.io/badge/python-3.10%20|%203.11%20|%203.12%20|%203.13%20|%203.14.0rc2-blue)](https://devguide.python.org/versions/)
+[![python versions](https://img.shields.io/badge/python-3.10%20|%203.11%20|%203.12%20|%203.13%20|%203.14-blue)](https://devguide.python.org/versions/)
 [![license MIT](https://img.shields.io/github/license/eliegoudout/paramclasses)](https://opensource.org/licenses/MIT)
 [![pypi](https://img.shields.io/pypi/v/paramclasses)](https://pypi.org/project/paramclasses/)
 [![pipeline status](https://github.com/eliegoudout/paramclasses/actions/workflows/ci.yml/badge.svg)](https://github.com/eliegoudout/paramclasses/actions)
diff --git a/pyproject.toml b/pyproject.toml
index 1a98eb2..1a96ee6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "paramclasses"
-version = "0.4.2.dev0"
+version = "0.4.2"
 description = "Parameter-holding classes with robust subclassing protection"
 readme = "README.md"
 requires-python = ">=3.10, <3.15"
diff --git a/test/paramclasses/conftest.py b/test/paramclasses/conftest.py
index 00fd919..538fbb3 100644
--- a/test/paramclasses/conftest.py
+++ b/test/paramclasses/conftest.py
@@ -420,10 +420,7 @@ def _make(  # noqa: C901, PLR0912  # Prefer complexity over modularization here
                 continue
 
             # `target` is an instance
-            target_base, _fill, _ = target.partition("_fill")
             instance = cls()
-
-            # `target` requires filling `vars(instance)`
             if target_is_fill:
                 for attr in attrs:
                     vars(instance)[attr] = fill
diff --git a/test/paramclasses/test_getsetdel_behaviour.py b/test/paramclasses/test_getsetdel_behaviour.py
index 2b810fc..1c43cb5 100644
--- a/test/paramclasses/test_getsetdel_behaviour.py
+++ b/test/paramclasses/test_getsetdel_behaviour.py
@@ -287,8 +287,6 @@ def test_delete_behaviour_unprotected_parameter_class_level(attr, kind, make):
 @parametrize_attr_kind("unprotected", "parameter")
 def test_delete_behaviour_unprotected_parameter_instance_level(attr, kind, make):
     """Always bypasses descriptors."""
-    param, param_fill = make("param, param_fill", kind)
-
     # Empty instance
     for obj in make("param, paramchild", kind):
         with pytest.raises(AttributeError, match=f"^{attr}$"):
diff --git a/uv.lock b/uv.lock
index d3e3bf9..81c3cc1 100644
--- a/uv.lock
+++ b/uv.lock
@@ -160,7 +160,7 @@ wheels = [
 
 [[package]]
 name = "paramclasses"
-version = "0.4.2.dev0"
+version = "0.4.2"
 source = { editable = "." }
 
 [package.dev-dependencies]