diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a8c31bb..746125f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,63 +9,38 @@ on:
   pull_request:
 
 jobs:
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Setup
-        uses: actions/setup-python@v2
-        with:
-          python-version: "3.7"
-      - name: Install and run linters
-        run: |
-          pip install pipenv
-          pipenv install --dev
-          pipenv run pylint ing_ynab
-          pipenv run black --check ing_ynab
   check:
-    name: Check setup.py requirements
+    name: Check
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Setup
-        uses: actions/setup-python@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: "3.7"
-      - name: Verify dependencies
-        run: |
-          pip install pipenv
-          pipenv install --dev
-          pipenv run pipenv-setup check
+          python-version: "3.12"
+      - uses: pdm-project/setup-pdm@v3
+      - run: pdm sync -d
+      - run: pdm run ruff check
+      - run: pdm run ruff format --check
   test:
     name: Test
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Setup
-        uses: actions/setup-python@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: "3.7"
-      - name: Install and run pytest
-        run: |
-          pip install pipenv
-          pipenv install --dev
-          pipenv run python -m pytest
+          python-version: "3.12"
+      - uses: pdm-project/setup-pdm@v3
+      - run: pdm sync -d
+      - run: pdm run pytest
   docker:
     name: Docker
     runs-on: ubuntu-latest
     needs:
-      - lint
       - check
       - test
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Login
+      - uses: actions/checkout@v4
+      - name: Log into docker
         run: docker login docker.pkg.github.com -u bahlo -p "${{ secrets.GITHUB_TOKEN }}"
       - name: Build docker container
         if: github.ref != 'refs/heads/main' && !startsWith(github.ref, 'refs/tags')
@@ -86,21 +61,15 @@ jobs:
     runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags')
     needs:
-      - lint
       - check
       - test
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Setup
-        uses: actions/setup-python@v2
-        with:
-          python-version: "3.7"
-      - name: Build module
-        run: |
-          pip3 install setuptools wheel
-          python3 setup.py sdist bdist_wheel
-      - name: Publish distribution to Test PyPI
-        uses: pypa/gh-action-pypi-publish@master
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
-          password: ${{ secrets.PYPI_TOKEN }}
+          python-version: "3.12"
+      - uses: pdm-project/setup-pdm@v3
+      - run: pdm publish
+        env:
+          PDM_PUBLISH_USERNAME: "__token__"
+          PDM_PUBLISH_PASSWORD: "${{ secrets.PYPI_TOKEN }}"
diff --git a/.gitignore b/.gitignore
index 31c06f8..5a2d441 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ build
 dist
 *.egg-info
 __pycache__
+.pdm-python
diff --git a/Dockerfile b/Dockerfile
index 62aadf4..afb5d44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,14 @@
-FROM python:3.7
+ARG PYTHON_BASE=3.12-slim
+FROM python:$PYTHON_BASE AS builder
+RUN pip install -U pdm
+ENV PDM_CHECK_UPDATE=false
+COPY pyproject.toml pdm.lock README.md /project/
+COPY src/ /project/src
+WORKDIR /project
+RUN pdm install --check --prod --no-editable
 
-COPY . /app
-WORKDIR /app
-RUN pip install .
-
-CMD ["ing-ynab"]
+FROM python:$PYTHON_BASE
+COPY --from=builder /project/.venv/ /project/.venv
+ENV PATH="/project/.venv/bin:$PATH"
+COPY src /project/src
+CMD ["python", "src/__main__.py"]
diff --git a/Pipfile b/Pipfile
deleted file mode 100644
index 24b361d..0000000
--- a/Pipfile
+++ /dev/null
@@ -1,22 +0,0 @@
-[[source]]
-name = "pypi"
-url = "https://pypi.python.org/simple"
-verify_ssl = true
-
-[dev-packages]
-pylint = "*"
-black = "*"
-pytest = "*"
-pipenv-setup = "*"
-
-[packages]
-requests = "*"
-fints = "*"
-python-dotenv = "*"
-chardet = "*"
-
-[requires]
-python_version = "3.7"
-
-[pipenv]
-allow_prereleases = true
diff --git a/Pipfile.lock b/Pipfile.lock
deleted file mode 100644
index 7be8e07..0000000
--- a/Pipfile.lock
+++ /dev/null
@@ -1,660 +0,0 @@
-{
-    "_meta": {
-        "hash": {
-            "sha256": "d44aee5dada4fbc96d3fe7a620278c6c5755336f9732b5856d3cb78e2a128f6d"
-        },
-        "pipfile-spec": 6,
-        "requires": {
-            "python_version": "3.7"
-        },
-        "sources": [
-            {
-                "name": "pypi",
-                "url": "https://pypi.python.org/simple",
-                "verify_ssl": true
-            }
-        ]
-    },
-    "default": {
-        "bleach": {
-            "hashes": [
-                "sha256:0900d8b37eba61a802ee40ac0061f8c2b5dee29c1927dd1d233e075ebf5a71da",
-                "sha256:4d2651ab93271d1129ac9cbc679f524565cc8a1b791909c4a51eac4446a15994"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==4.1.0"
-        },
-        "certifi": {
-            "hashes": [
-                "sha256:78884e7c1d4b00ce3cea67b44566851c4343c120abd683433ce934a68ea58872",
-                "sha256:d62a0163eb4c2344ac042ab2bdf75399a71a2d8c7d47eac2e2ee91b9d6339569"
-            ],
-            "version": "==2021.10.8"
-        },
-        "chardet": {
-            "hashes": [
-                "sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa",
-                "sha256:f864054d66fd9118f2e67044ac8981a54775ec5b67aed0441892edb553d21da5"
-            ],
-            "index": "pypi",
-            "version": "==4.0.0"
-        },
-        "charset-normalizer": {
-            "hashes": [
-                "sha256:1eecaa09422db5be9e29d7fc65664e6c33bd06f9ced7838578ba40d58bdf3721",
-                "sha256:b0b883e8e874edfdece9c28f314e3dd5badf067342e42fb162203335ae61aa2c"
-            ],
-            "markers": "python_version >= '3'",
-            "version": "==2.0.9"
-        },
-        "elementpath": {
-            "hashes": [
-                "sha256:1e98a4f5e8ccb5fe147074adda751c648d4a752973212298b6c9fc18c3a8c3e6",
-                "sha256:5b6801b3be94d48d213beb7b8ebad96addb35c95fc6a9c062c80e033b4a32fe8"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==2.4.0"
-        },
-        "fints": {
-            "hashes": [
-                "sha256:c3889f57fd6bedcefd09b34a6e8d40a6e7b6177088435ed618050655600af53d",
-                "sha256:d8a8920fb324a6a4cad2edc0a1a88a7a80b1072b5dc76af13f853ad8cbf80be7"
-            ],
-            "index": "pypi",
-            "version": "==3.0.1"
-        },
-        "idna": {
-            "hashes": [
-                "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff",
-                "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"
-            ],
-            "markers": "python_version >= '3'",
-            "version": "==3.3"
-        },
-        "mt-940": {
-            "hashes": [
-                "sha256:1f727184a12a8f289310620d9a7fbdda2737c396fb5abb356838a7d2823359b0",
-                "sha256:9274bc8298b2d4b69cb3936bdcda315b50e45975789f519a237bdec58346b8d7"
-            ],
-            "version": "==4.23.0"
-        },
-        "packaging": {
-            "hashes": [
-                "sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb",
-                "sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==21.3"
-        },
-        "pyparsing": {
-            "hashes": [
-                "sha256:04ff808a5b90911829c55c4e26f75fa5ca8a2f5f36aa3a51f68e27033341d3e4",
-                "sha256:d9bdec0013ef1eb5a84ab39a3b3868911598afa494f5faa038647101504e2b81"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==3.0.6"
-        },
-        "python-dotenv": {
-            "hashes": [
-                "sha256:32b2bdc1873fd3a3c346da1c6db83d0053c3c62f28f1f38516070c4c8971b1d3",
-                "sha256:a5de49a31e953b45ff2d2fd434bbc2670e8db5273606c1e737cc6b93eff3655f"
-            ],
-            "index": "pypi",
-            "version": "==0.19.2"
-        },
-        "requests": {
-            "hashes": [
-                "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24",
-                "sha256:b8aa58f8cf793ffd8782d3d8cb19e66ef36f7aba4353eec859e74678b01b07a7"
-            ],
-            "index": "pypi",
-            "version": "==2.26.0"
-        },
-        "sepaxml": {
-            "hashes": [
-                "sha256:06d72ef9514e17e7b59cd49ca898e6aa9f2a895eef4282d03a443faea64f231d",
-                "sha256:c5b82a84ae76965b5e5076918d8f2c8a170a8bf27756be0e8a7904a878699422"
-            ],
-            "version": "==2.5.0"
-        },
-        "six": {
-            "hashes": [
-                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
-                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
-            ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==1.16.0"
-        },
-        "text-unidecode": {
-            "hashes": [
-                "sha256:1311f10e8b895935241623731c2ba64f4c455287888b18189350b67134a822e8",
-                "sha256:bad6603bb14d279193107714b288be206cac565dfa49aa5b105294dd5c4aab93"
-            ],
-            "version": "==1.3"
-        },
-        "urllib3": {
-            "hashes": [
-                "sha256:4987c65554f7a2dbf30c18fd48778ef124af6fab771a377103da0585e2336ece",
-                "sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844"
-            ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
-            "version": "==1.26.7"
-        },
-        "webencodings": {
-            "hashes": [
-                "sha256:a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78",
-                "sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"
-            ],
-            "version": "==0.5.1"
-        },
-        "xmlschema": {
-            "hashes": [
-                "sha256:91ebcb6b92f7db1243904b4f6d11f8b354a059d4d9fa4880b52f132a24a3226f",
-                "sha256:99b24c60efaa2cc3a1fe52f40a4f7a213e317a0b0ae255550bb4f0f91ce4ca72"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==1.9.1"
-        }
-    },
-    "develop": {
-        "appdirs": {
-            "hashes": [
-                "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41",
-                "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"
-            ],
-            "version": "==1.4.4"
-        },
-        "astroid": {
-            "hashes": [
-                "sha256:3975a0bd5373bdce166e60c851cfcbaf21ee96de80ec518c1f4cb3e94c3fb334",
-                "sha256:ab7f36e8a78b8e54a62028ba6beef7561db4cdb6f2a5009ecc44a6f42b5697ef"
-            ],
-            "markers": "python_version ~= '3.6'",
-            "version": "==2.6.6"
-        },
-        "attrs": {
-            "hashes": [
-                "sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1",
-                "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"
-            ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==21.2.0"
-        },
-        "black": {
-            "hashes": [
-                "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b",
-                "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
-            ],
-            "index": "pypi",
-            "version": "==19.10b0"
-        },
-        "cached-property": {
-            "hashes": [
-                "sha256:9fa5755838eecbb2d234c3aa390bd80fbd3ac6b6869109bfc1b499f7bd89a130",
-                "sha256:df4f613cf7ad9a588cc381aaf4a512d26265ecebd5eb9e1ba12f1319eb85a6a0"
-            ],
-            "version": "==1.5.2"
-        },
-        "cerberus": {
-            "hashes": [
-                "sha256:d1b21b3954b2498d9a79edf16b3170a3ac1021df88d197dc2ce5928ba519237c"
-            ],
-            "version": "==1.3.4"
-        },
-        "certifi": {
-            "hashes": [
-                "sha256:78884e7c1d4b00ce3cea67b44566851c4343c120abd683433ce934a68ea58872",
-                "sha256:d62a0163eb4c2344ac042ab2bdf75399a71a2d8c7d47eac2e2ee91b9d6339569"
-            ],
-            "version": "==2021.10.8"
-        },
-        "chardet": {
-            "hashes": [
-                "sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa",
-                "sha256:f864054d66fd9118f2e67044ac8981a54775ec5b67aed0441892edb553d21da5"
-            ],
-            "index": "pypi",
-            "version": "==4.0.0"
-        },
-        "charset-normalizer": {
-            "hashes": [
-                "sha256:1eecaa09422db5be9e29d7fc65664e6c33bd06f9ced7838578ba40d58bdf3721",
-                "sha256:b0b883e8e874edfdece9c28f314e3dd5badf067342e42fb162203335ae61aa2c"
-            ],
-            "markers": "python_version >= '3'",
-            "version": "==2.0.9"
-        },
-        "click": {
-            "hashes": [
-                "sha256:353f466495adaeb40b6b5f592f9f91cb22372351c84caeb068132442a4518ef3",
-                "sha256:410e932b050f5eed773c4cda94de75971c89cdb3155a72a0831139a79e5ecb5b"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==8.0.3"
-        },
-        "colorama": {
-            "hashes": [
-                "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b",
-                "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"
-            ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==0.4.4"
-        },
-        "distlib": {
-            "hashes": [
-                "sha256:6564fe0a8f51e734df6333d08b8b94d4ea8ee6b99b5ed50613f731fd4089f34b",
-                "sha256:e4b58818180336dc9c529bfb9a0b58728ffc09ad92027a3f30b7cd91e3458579"
-            ],
-            "version": "==0.3.4"
-        },
-        "idna": {
-            "hashes": [
-                "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff",
-                "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"
-            ],
-            "markers": "python_version >= '3'",
-            "version": "==3.3"
-        },
-        "importlib-metadata": {
-            "hashes": [
-                "sha256:53ccfd5c134223e497627b9815d5030edf77d2ed573922f7a0b8f8bb81a1c100",
-                "sha256:75bdec14c397f528724c1bfd9709d660b33a4d2e77387a3358f20b848bb5e5fb"
-            ],
-            "markers": "python_version < '3.8'",
-            "version": "==4.8.2"
-        },
-        "iniconfig": {
-            "hashes": [
-                "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3",
-                "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"
-            ],
-            "version": "==1.1.1"
-        },
-        "isort": {
-            "hashes": [
-                "sha256:6f62d78e2f89b4500b080fe3a81690850cd254227f27f75c3a0c491a1f351ba7",
-                "sha256:e8443a5e7a020e9d7f97f1d7d9cd17c88bcb3bc7e218bf9cf5095fe550be2951"
-            ],
-            "markers": "python_version < '4' and python_full_version >= '3.6.1'",
-            "version": "==5.10.1"
-        },
-        "lazy-object-proxy": {
-            "hashes": [
-                "sha256:17e0967ba374fc24141738c69736da90e94419338fd4c7c7bef01ee26b339653",
-                "sha256:1fee665d2638491f4d6e55bd483e15ef21f6c8c2095f235fef72601021e64f61",
-                "sha256:22ddd618cefe54305df49e4c069fa65715be4ad0e78e8d252a33debf00f6ede2",
-                "sha256:24a5045889cc2729033b3e604d496c2b6f588c754f7a62027ad4437a7ecc4837",
-                "sha256:410283732af311b51b837894fa2f24f2c0039aa7f220135192b38fcc42bd43d3",
-                "sha256:4732c765372bd78a2d6b2150a6e99d00a78ec963375f236979c0626b97ed8e43",
-                "sha256:489000d368377571c6f982fba6497f2aa13c6d1facc40660963da62f5c379726",
-                "sha256:4f60460e9f1eb632584c9685bccea152f4ac2130e299784dbaf9fae9f49891b3",
-                "sha256:5743a5ab42ae40caa8421b320ebf3a998f89c85cdc8376d6b2e00bd12bd1b587",
-                "sha256:85fb7608121fd5621cc4377a8961d0b32ccf84a7285b4f1d21988b2eae2868e8",
-                "sha256:9698110e36e2df951c7c36b6729e96429c9c32b3331989ef19976592c5f3c77a",
-                "sha256:9d397bf41caad3f489e10774667310d73cb9c4258e9aed94b9ec734b34b495fd",
-                "sha256:b579f8acbf2bdd9ea200b1d5dea36abd93cabf56cf626ab9c744a432e15c815f",
-                "sha256:b865b01a2e7f96db0c5d12cfea590f98d8c5ba64ad222300d93ce6ff9138bcad",
-                "sha256:bf34e368e8dd976423396555078def5cfc3039ebc6fc06d1ae2c5a65eebbcde4",
-                "sha256:c6938967f8528b3668622a9ed3b31d145fab161a32f5891ea7b84f6b790be05b",
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-                "sha256:9c6d1a54552b5330bc657b7ef0eae25d00ba7ffe85d9ea8ae6540d2197a3788c",
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-                "sha256:af3d4a73793725138d6b334d9d247ce7e5f084d96284ed23f22ee626a7b88e39",
-                "sha256:b36b4f3920103a25e1d5d024d155c504080959582b928e91cb608a65c3a49e1a",
-                "sha256:b9574c6f03f685070d859e75c7f9eeca02d6933273b5e69572e5ff9d5e3931c3",
-                "sha256:bff6ad71c81b3bba8fa35f0f1921fb24ff4476235a6e94a26ada2e54370e6da7",
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-                "sha256:c907f561b1e83e93fad565bac5ba9c22d96a54e7ea0267c708bffe863cbe4075",
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-                "sha256:dd4a21253f42b8d2b48410cb31fe501d32f8b9fbeb1f55063ad102fe9c425e40",
-                "sha256:dde816ca9dac1d9c01dd504ea5967821606f02e510438120091b84e852367428",
-                "sha256:f2362f3cb0f3172c42938946dbc5b7843c2a28aec307c49100c8b38764eb6927",
-                "sha256:f328adcfebed9f11301eaedfa48e15bdece9b519fb27e6a8c01aa52a17ec31b3",
-                "sha256:f8afcf15cc511ada719a88e013cec87c11aff7b91f019295eb4530f96fe5ef2f",
-                "sha256:fb1bbeac803adea29cedd70781399c99138358c26d05fcbd23c13016b7f5ec65"
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-            "version": "==1.4.3"
-        },
-        "typing-extensions": {
-            "hashes": [
-                "sha256:4ca091dea149f945ec56afb48dae714f21e8692ef22a395223bcd328961b6a0e",
-                "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"
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-            "version": "==4.0.1"
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-        "urllib3": {
-            "hashes": [
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-                "sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844"
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-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
-            "version": "==1.26.7"
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-        "vistir": {
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-                "sha256:a37079cdbd85d31a41cdd18457fe521e15ec08b255811e81aa061fd5f48a20fb",
-                "sha256:eff1d19ef50c703a329ed294e5ec0b0fbb35b96c1b3ee6dcdb266dddbe1e935a"
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-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==0.5.2"
-        },
-        "wheel": {
-            "hashes": [
-                "sha256:21014b2bd93c6d0034b6ba5d35e4eb284340e09d63c59aef6fc14b0f346146fd",
-                "sha256:e2ef7239991699e3355d54f8e968a21bb940a1dbf34a4d226741e64462516fad"
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-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==0.37.0"
-        },
-        "wrapt": {
-            "hashes": [
-                "sha256:b62ffa81fb85f4332a4f609cab4ac40709470da05643a082ec1eb88e6d9b97d7"
-            ],
-            "version": "==1.12.1"
-        },
-        "zipp": {
-            "hashes": [
-                "sha256:71c644c5369f4a6e07636f0aa966270449561fcea2e3d6747b8d23efaa9d7832",
-                "sha256:9fe5ea21568a0a70e50f273397638d39b03353731e6cbbb3fd8502a33fec40bc"
-            ],
-            "markers": "python_version >= '3.6'",
-            "version": "==3.6.0"
-        }
-    }
-}
diff --git a/README.md b/README.md
index fceb556..f6237df 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,3 @@
-:warning: Unmaintained. YNAB now supports
-[linking](https://docs.youneedabudget.com/article/172-link-account) your ING
-Account directly in their app.
-
-----
-
 ![ing-ynab logo](logo.jpg)
 
 [![ci](https://github.com/bahlo/fints_ynab/workflows/ci/badge.svg)](https://github.com/bahlo/ing-ynab/actions?query=workflow%3Aci)
@@ -15,107 +9,85 @@ Import your ING Germany bank statements via FinTS into YNAB.
 
 ## Setup
 
-Before setting this up, please 
-[register your FinTS product](#how-do-i-register-the-fints-product) 
-– it's free and takes only a few days.  
-If you don't do this, the application will fallback to the product id from the
-[python-fints](https://python-fints.readthedocs.io) library, which should only
-be used for evaluation.
+Before setting this up, you need to
+[register your FinTS product](#how-do-i-register-the-fints-product)
+– it's free and takes only a few days.
 
-Since this application will need your ING pin and YNAB access token it's 
-recommended to run this in your local network (could be a Raspberry Pi, it's 
+Since this application will need your ING pin and YNAB access token it's
+recommended to run this in your local network (could be a Raspberry Pi, it's
 pretty light).
 
-There are various ways to start the application:
-
-### Local
-
-This can be run on any environment with Python 3.7 or higher.
+To start the application you need Python 3.12 or higher as well as
+[pdm](https://pdm-project.org/en/latest/).
 
 ```sh
-$ python3 -m pip install ing-ynab
-$ touch .env # see configuration section
-$ ing-ynab
-```
-
-### Docker
-
-```sh
-$ cp .env.example .env # and customize fields
-$ docker run --env-file .env docker.pkg.github.com/bahlo/ing-ynab/ing-ynab:2.0.2
-```
-
-### docker-compose
-
-```yml
-version: "2.0"
-
-services:
-  ing-ynab:
-    image: docker.pkg.github.com/bahlo/ing-ynab/ing-ynab:2.0.2
-    environment:
-      # Environment variables, see the configuration section
+$ pdm install
+$ pdm run start
 ```
 
 ## Configuration
 
 The configuration is done via environment variables:
 
-* `SLEEP_INTERVAL_SECONDS`: Interval in seconds until the next check happens 
+- `SLEEP_INTERVAL_SECONDS`: Interval in seconds until the next check happens
   (defaults to 5 minutes).
-* `FINTS_PRODUCT_ID`: Your FinTS product ID (deafults to python-fints one).
-* `ING_LOGIN`: The login id of your ING account.
-* `ING_IBAN`: The IBAN of the account you want to add.
-* `ING_PIN`: The pin of your ING account (leave empty to be prompted).
-* `YNAB_ACCESS_TOKEN`: Go to your budget settings to create one (leave empty
+- `FINTS_PRODUCT_ID`: Your FinTS product ID (deafults to python-fints one).
+- `ING_LOGIN`: The login id of your ING account.
+- `ING_IBAN`: The IBAN of the account you want to add.
+- `ING_PIN`: The pin of your ING account (leave empty to be prompted).
+- `YNAB_ACCESS_TOKEN`: Go to your budget settings to create one (leave empty
   to be prompted).
-* `YNAB_BUDGET_ID`: On the webpage of your budget the first UUID in the path (`https://app.youneedabudget.com/<BUDGET_UUID>/budget/202109`).
-* `YNAB_ACCOUNT_ID`: On the webpage of the bank account the last UUID in the path (`https://app.youneedabudget.com/<BUDGET_UUID>/accounts/<BANK_ACCOUNT_UUID>`).
-* `YNAB_FLAG_COLOR`: If set, use that color for the imported transactions.
-* `DEBUG`: Set to `1` to enable debug output and print transactions instead of
+- `YNAB_BUDGET_ID`: On the webpage of your budget the first UUID in the path (`https://app.youneedabudget.com/<BUDGET_UUID>/budget/202109`).
+- `YNAB_ACCOUNT_ID`: On the webpage of the bank account the last UUID in the path (`https://app.youneedabudget.com/<BUDGET_UUID>/accounts/<BANK_ACCOUNT_UUID>`).
+- `YNAB_FLAG_COLOR`: If set, use that color for the imported transactions.
+- `DEBUG`: Set to `1` to enable debug output and print transactions instead of
   importing them.
 
 ## Security
 
-You can pass in your bank pin and YNAB access token via environment variables, 
-if you like. This has the drawback that anyone with system access can read 
+You can pass in your bank pin and YNAB access token via environment variables,
+if you like. This has the drawback that anyone with system access can read
 and potentially use them so it's discouraged (but supported).
 
 The alternative is not specifying `YNAB_ACCESS_TOKEN` and/or `ING_PIN`, which
 will cause the application to prompt you on startup. This has the drawback that
 you need to input them everytime the application restarts.
 
-For docker you'll need to pass the `-it` flags to be able to input these 
+For docker you'll need to pass the `-it` flags to be able to input these
 variables. For docker-compose, add these fields:
+
 ```yml
-  tty: true
-  stdin_open: true
+tty: true
+stdin_open: true
 ```
 
-After starting with `docker-compose up -d`, run `docker attach $container_id` 
-to attach to the container. Note that the prompt for the pin might be hidden, 
+After starting with `docker-compose up -d`, run `docker attach $container_id`
+to attach to the container. Note that the prompt for the pin might be hidden,
 so you have to enter the pin directly.
 
 ## FAQ
 
 ### Why is this ING-only? Isn't FinTS a general protocol?
+
 It is, but the implementations differ a lot. This actually started out as a
-general-purpose library but I can only really test ING and I rather have a 
-specialised library than a multipurpose one where I can't guarantee 
+general-purpose library but I can only really test ING and I rather have a
+specialised library than a multipurpose one where I can't guarantee
 functionality.
 
 ### Can you support my bank?
+
 The [python-fints](https://github.com/raphaelm/python-fints) library supports
 a lot of banks, so probably. But we need to work together as I can't test it.
 Feel free to get in touch: <hallo@arne.me>
 
 ### How do I register the FinTS product?
+
 1. Go to the [FinTS product registration](https://www.hbci-zka.de/register/prod_register.htm)
 2. Click `Registrierungsprozess` to get to a PDF form
 3. Fill in your data. If you don't know what else to put, here are some suggestions:
-   * `Firmenbezeichnung`: Your name
-   * `Produktname`: `ing-ynab`
-   * `Produktkategorie`: `Web-Server`
+   - `Firmenbezeichnung`: Your name
+   - `Produktname`: `ing-ynab`
+   - `Produktkategorie`: `Web-Server`
 4. Send the form to the email adress on the last page
 
 After a week or two you will get your product id via email.
diff --git a/pdm.lock b/pdm.lock
new file mode 100644
index 0000000..f118098
--- /dev/null
+++ b/pdm.lock
@@ -0,0 +1,469 @@
+# This file is @generated by PDM.
+# It is not intended for manual editing.
+
+[metadata]
+groups = ["default", "dev"]
+strategy = ["inherit_metadata"]
+lock_version = "4.5.0"
+content_hash = "sha256:cc44da23aba3c0adde28394de612125059ef4f89afcb7639d3c1b6b87013cd69"
+
+[[metadata.targets]]
+requires_python = ">=3.7"
+
+[[package]]
+name = "bleach"
+version = "6.0.0"
+requires_python = ">=3.7"
+summary = "An easy safelist-based HTML-sanitizing tool."
+groups = ["default"]
+dependencies = [
+    "six>=1.9.0",
+    "webencodings",
+]
+files = [
+    {file = "bleach-6.0.0-py3-none-any.whl", hash = "sha256:33c16e3353dbd13028ab4799a0f89a83f113405c766e9c122df8a06f5b85b3f4"},
+    {file = "bleach-6.0.0.tar.gz", hash = "sha256:1a1a85c1595e07d8db14c5f09f09e6433502c51c595970edc090551f0db99414"},
+]
+
+[[package]]
+name = "certifi"
+version = "2024.7.4"
+requires_python = ">=3.6"
+summary = "Python package for providing Mozilla's CA Bundle."
+groups = ["default"]
+files = [
+    {file = "certifi-2024.7.4-py3-none-any.whl", hash = "sha256:c198e21b1289c2ab85ee4e67bb4b4ef3ead0892059901a8d5b622f24a1101e90"},
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+]
+
+[[package]]
+name = "charset-normalizer"
+version = "3.3.2"
+requires_python = ">=3.7.0"
+summary = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
+groups = ["default"]
+files = [
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+    "text-unidecode",
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+groups = ["dev"]
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+summary = "Character encoding aliases for legacy web content"
+groups = ["default"]
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+version = "2.5.1"
+requires_python = ">=3.7"
+summary = "An XML Schema validator and decoder"
+groups = ["default"]
+dependencies = [
+    "elementpath<5.0.0,>=4.1.5",
+]
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+]
+
+[[package]]
+name = "zipp"
+version = "3.15.0"
+requires_python = ">=3.7"
+summary = "Backport of pathlib-compatible object wrapper for zip files"
+groups = ["dev"]
+marker = "python_version < \"3.8\""
+files = [
+    {file = "zipp-3.15.0-py3-none-any.whl", hash = "sha256:48904fc76a60e542af151aded95726c1a5c34ed43ab4134b597665c86d7ad556"},
+    {file = "zipp-3.15.0.tar.gz", hash = "sha256:112929ad649da941c23de50f356a2b5570c954b65150642bccdd66bf194d224b"},
+]
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..1d85c1c
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,35 @@
+[project]
+name = "ing-ynab"
+version = "0.3.0"
+description = "Import your ING Germany bank statements via FinTS into YNAB."
+authors = [{ name = "Arne Bahlo", email = "hey@arne.me" }]
+dependencies = [
+    "requests",
+    "fints>=4.0.0",
+    "enum-tools>=0.12.0",
+]
+requires-python = ">=3.7"
+readme = "README.md"
+license = { text = "MIT" }
+
+[build-system]
+requires = ["pdm-backend"]
+build-backend = "pdm.backend"
+
+
+[tool.pdm]
+distribution = true
+
+[tool.pdm.resolution]
+allow-prereleases = true
+
+[[tool.pdm.source]]
+name = "pypi"
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+
+[tool.pdm.dev-dependencies]
+dev = ["pytest", "ruff"]
+
+[tool.pdm.scripts]
+start = { shell = "cd src && python -m ing_ynab" }
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 15abc3c..0000000
--- a/setup.py
+++ /dev/null
@@ -1,49 +0,0 @@
-from setuptools import setup, find_packages
-
-from ing_ynab import VERSION
-
-with open("README.md", "r") as fh:
-    long_description = fh.read()
-
-setup(
-    name="ing-ynab",
-    version=VERSION,
-    description="Import your ING Germany bank statements via FinTS into YNAB",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/bahlo/ing-ynab",
-    author="Arne Bahlo",
-    author_email="hallo@arne.me",
-    license="MIT",
-    keywords="ing ynab fints",
-    packages=find_packages(exclude=["tests*"]),
-    install_requires=[
-        "bleach==4.1.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-        "certifi==2021.10.8",
-        "chardet==4.0.0",
-        "elementpath==2.4.0",
-        "fints==3.0.1",
-        "idna==3.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-        "mt-940==4.23.0",
-        "packaging==21.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-        "pyparsing==3.0.6; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-        "python-dotenv==0.19.2",
-        "requests==2.27.1",
-        "sepaxml==2.5.0",
-        "six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-        "text-unidecode==1.3",
-        "urllib3==1.25.10; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
-        "webencodings==0.5.1",
-        "xmlschema==1.9.2",
-    ],
-    dependency_links=[],
-    python_requires=">=3.7",
-    entry_points={"console_scripts": ["ing-ynab=ing_ynab.cli:main"]},
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Intended Audience :: End Users/Desktop",
-        "License :: OSI Approved :: MIT License",
-        "Programming Language :: Python :: 3.7",
-        "Typing :: Typed",
-    ],
-)
diff --git a/ing_ynab/__init__.py b/src/ing_ynab/__init__.py
similarity index 98%
rename from ing_ynab/__init__.py
rename to src/ing_ynab/__init__.py
index 0e06ef4..8d29f88 100644
--- a/ing_ynab/__init__.py
+++ b/src/ing_ynab/__init__.py
@@ -1,4 +1,5 @@
 """
 This module contains only the version.
 """
+
 VERSION = "2.0.2"
diff --git a/ing_ynab/__main__.py b/src/ing_ynab/__main__.py
similarity index 79%
rename from ing_ynab/__main__.py
rename to src/ing_ynab/__main__.py
index 78a546c..22e3f80 100644
--- a/ing_ynab/__main__.py
+++ b/src/ing_ynab/__main__.py
@@ -4,7 +4,7 @@
 
 import sys
 
-from ing_ynab.cli import main
+from .cli import main
 
 if __name__ == "__main__":
     sys.exit(main())
diff --git a/ing_ynab/cli.py b/src/ing_ynab/cli.py
similarity index 91%
rename from ing_ynab/cli.py
rename to src/ing_ynab/cli.py
index 3bf55fd..abe7d95 100644
--- a/ing_ynab/cli.py
+++ b/src/ing_ynab/cli.py
@@ -1,6 +1,7 @@
 """
 This module contains the core business logic.
 """
+
 from datetime import date, timedelta
 from time import sleep
 from typing import NoReturn
@@ -8,14 +9,15 @@
 import os
 import sys
 from getpass import getpass
-from dotenv import load_dotenv
 
-from ing_ynab.ynab import YNABClient, YNABError
-from ing_ynab.ing import INGClient, AccountNotFoundException
+from .ynab import YNABClient, YNABError
+from .ing import INGClient, AccountNotFoundException
 
 
 def ing_to_ynab(
-    ing_client: INGClient, ynab_client: YNABClient, debug: bool = False,
+    ing_client: INGClient,
+    ynab_client: YNABClient,
+    debug: bool = False,
 ) -> NoReturn:
     """
     This code is called in a predefined interval to add new ing transactions
@@ -47,8 +49,6 @@ def main() -> int:
     """
     Start the main business logic.
     """
-    load_dotenv()
-
     # Parse environment variables
     debug = os.environ.get("DEBUG") == "1"
     if debug:
@@ -95,7 +95,7 @@ def main() -> int:
             print("Could not import transactions: %s" % ex)
         except KeyboardInterrupt:
             raise  # We need to have this case for ^C to work
-        except:  # pylint: disable=bare-except
+        except Exception as _e:
             print("Unexpected error:", sys.exc_info()[0])
         print("Sleeping for %d seconds" % sleep_interval)
         sleep(sleep_interval)
diff --git a/ing_ynab/ing.py b/src/ing_ynab/ing.py
similarity index 88%
rename from ing_ynab/ing.py
rename to src/ing_ynab/ing.py
index 42cec6d..a2487b6 100644
--- a/ing_ynab/ing.py
+++ b/src/ing_ynab/ing.py
@@ -1,6 +1,7 @@
 """
 Provides classes and functions to work with the ING FinTS API.
 """
+
 import datetime
 from typing import Optional, List
 from mt940.models import Transaction
@@ -33,7 +34,11 @@ class INGClient:
 
     def __init__(self, login: str, pin: str, fints_product_id: Optional[str] = None):
         self.fints_client = FinTS3PinTanClient(
-            ING_DE_BLZ, login, pin, ING_DE_ENDPOINT, product_id=fints_product_id,
+            ING_DE_BLZ,
+            login,
+            pin,
+            ING_DE_ENDPOINT,
+            product_id=fints_product_id,
         )
 
     def select_account(self, iban: str) -> None:
@@ -52,7 +57,8 @@ def select_account(self, iban: str) -> None:
             raise AccountNotFoundException(accounts)
 
     def get_transactions(
-        self, start_date: Optional[datetime.datetime] = None,
+        self,
+        start_date: Optional[datetime.datetime] = None,
     ) -> List[Transaction]:
         """
         Get transactions for the selected account.
diff --git a/ing_ynab/ynab.py b/src/ing_ynab/ynab.py
similarity index 98%
rename from ing_ynab/ynab.py
rename to src/ing_ynab/ynab.py
index a56a42c..3c48758 100644
--- a/ing_ynab/ynab.py
+++ b/src/ing_ynab/ynab.py
@@ -1,6 +1,7 @@
 """
 Provides methods to work with the YNAB API.
 """
+
 import re
 from datetime import date
 from decimal import Decimal
@@ -74,7 +75,8 @@ def latest_transaction_date(self) -> Optional[date]:
         return date.fromisoformat(body["data"]["transactions"][-1]["date"])
 
     def transform_transactions(
-        self, transactions: List[FinTSTransaction],
+        self,
+        transactions: List[FinTSTransaction],
     ) -> List[Dict[str, str]]:
         """
         Transform the FinTS transactions into something the YNAB API understands.
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29