diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6610013..2e7f034 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   pypi_release:
-    name: Build with Poetry and Publish to PyPI
+    name: Build and Publish to PyPI
     runs-on: ubuntu-latest
     environment:
       name: pypi
@@ -16,9 +16,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
-      - name: Install and configure Poetry
-        run: pip install poetry
-      - name: Publish package
-        run: poetry build
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          version: latest
+          enable-cache: true
+      - name: Build package
+        run: uv build
       - name: Publish package distributions to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3bcffe1..b436298 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,23 +1,13 @@
 name: Test
 
 on:
-  - push
-  - pull_request
+  pull_request:
+  push:
+    branches:
+      - main
 
 jobs:
-  pre_job:
-    runs-on: ubuntu-latest
-    outputs:
-      should_skip: ${{ steps.skip_check.outputs.should_skip }}
-    steps:
-      - id: skip_check
-        uses: fkirc/skip-duplicate-actions@master
-        with:
-          do_not_skip: '["pull_request"]'
-          cancel_others: 'true'
-          concurrent_skipping: same_content
   ruff:
-    needs: pre_job
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -44,15 +34,14 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Install and configure Poetry
-        run: |
-          pip install poetry
-          poetry config virtualenvs.in-project true
-      - name: Install dependencies
-        run: poetry install
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          version: latest
+          enable-cache: true
       - name: Run pytest
         run: |
-          poetry run pytest -vvv -ra --cov=cryptojwt --cov-report=xml
+          uv run pytest -vvv -ra --cov=cryptojwt --cov-report=xml
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
         with:
diff --git a/.gitignore b/.gitignore
index 05dd57f..777c976 100644
--- a/.gitignore
+++ b/.gitignore
@@ -137,5 +137,4 @@ tests/pyoidc
 tests/pyoidc.pub
 tests/xtest_usage.py
 
-# Poetry
-poetry.lock
+*.lock
diff --git a/Makefile b/Makefile
index 81002fc..bbae2e2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 all:
 
 test:
-	poetry run pytest --ruff --ruff-format --cov
+	uv run pytest --ruff --ruff-format --cov
 
 reformat:
-	poetry run ruff check --select I --fix src tests
-	poetry run ruff format src tests
+	uv run ruff check --select I --fix src tests
+	uv run ruff format src tests
diff --git a/pyproject.toml b/pyproject.toml
index ed17238..bd8b719 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,41 +1,51 @@
 # PEP 518: https://www.python.org/dev/peps/pep-0518/
 
-[tool.poetry]
+[project]
 name = "cryptojwt"
-version = "1.9.4"
+dynamic = ["version"]
 description = "Python implementation of JWT, JWE, JWS and JWK"
-authors = ["Roland Hedberg <roland@catalogix.se>"]
+authors = [
+    {name="Roland Hedberg", email = "roland@catalogix.se"}
+]
 license = "Apache-2.0"
 repository = "https://github.com/IdentityPython/JWTConnect-Python-CryptoJWT"
 readme = "README.md"
 packages = [
     { include = "cryptojwt", from = "src" }
 ]
+requires-python = ">=3.9,<4.0"
+dependencies = [
+    "cryptography>=3.4.6",
+    "requests>=2.25.1"
+]
 
-[tool.poetry.scripts]
+[project.scripts]
 jwkgen = "cryptojwt.tools.keygen:main"
 jwkconv = "cryptojwt.tools.keyconv:main"
 jwtpeek = "cryptojwt.tools.jwtpeek:main"
 
-[tool.poetry.dependencies]
-python = "^3.9"
-cryptography = ">=3.4.6"
-requests = "^2.25.1"
+[build-system]
+requires = ["hatchling", "uv-dynamic-versioning"]
+build-backend = "hatchling.build"
+
+[tool.hatch.version]
+source = "uv-dynamic-versioning"
 
-[tool.poetry.group.dev.dependencies]
-alabaster = "^0.7.12"
-pytest = "^8.2.1"
-pytest-cov = "^4.0.0"
-responses = "^0.13.0"
-sphinx = "^3.5.2"
-sphinx-autobuild = "^2021.3.14"
-coverage = "^7"
-ruff = ">=0.9.9"
-pytest-ruff = "^0.3.2"
+[tool.hatch.metadata]
+allow-direct-references = true
 
-[build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+[dependency-groups]
+dev = [
+    "alabaster>=0.7.12",
+    "pytest>=8.2.1",
+    "pytest-cov>=4.0.0",
+    "responses>=0.13.0",
+    "sphinx>=3.5.2",
+    "sphinx-autobuild>=2021.3.14",
+    "coverage>=7",
+    "ruff>=0.9.9",
+    "pytest-ruff>=0.3.2"
+]
 
 [tool.coverage.run]
 branch = true
diff --git a/src/cryptojwt/__init__.py b/src/cryptojwt/__init__.py
index a53a26c..cd515ac 100644
--- a/src/cryptojwt/__init__.py
+++ b/src/cryptojwt/__init__.py
@@ -1,7 +1,7 @@
 """JSON Web Token"""
 
 import logging
-from importlib.metadata import version
+from importlib.metadata import version, PackageNotFoundError
 
 from cryptojwt.jwe.jwe import JWE
 from cryptojwt.jwk import JWK
@@ -13,7 +13,10 @@
 from .exception import BadSyntax
 from .utils import as_unicode, b64d, b64encode_item, split_token
 
-__version__ = version("cryptojwt")
+try:
+    __version__ = version("cryptojwt")
+except PackageNotFoundError:
+    __version__ = "0.0.0"
 
 __all__ = [
     "JWE",