diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 21bdc03..4f353b9 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -22,10 +22,10 @@ jobs:
     strategy:
       matrix:
         python_version: [
-            3.8,  # only lowest & highest version should be enough, :cross_fingers:
-#            3.9,
-#            '3.10',
-            '3.11'
+            3.9,  # only lowest & highest version should be enough, :cross_fingers:
+#            3.10,
+#            '3.11',
+            '3.12'
             # pypy3  # didn't build on CI anymore, happy for help: https://github.com/gis-ops/routing-py/issues/60
         ]
     steps:
diff --git a/.github/workflows/publish-tags.yml b/.github/workflows/publish-tags.yml
index db1ec86..8ffbda9 100644
--- a/.github/workflows/publish-tags.yml
+++ b/.github/workflows/publish-tags.yml
@@ -3,9 +3,9 @@ name: Publish wheels
 on:
   push:
     branches-ignore:
-      - '*'
+      - "*"
     tags:
-      - '*'
+      - "*"
 
 jobs:
   build_wheels:
@@ -16,7 +16,7 @@ jobs:
       - name: Set up Python 3.10
         uses: actions/setup-python@v2
         with:
-          python-version: '3.10'
+          python-version: "3.10"
 
       - name: Build Wheels
         run: |
@@ -36,7 +36,7 @@ jobs:
       - name: Set up python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.10'
+          python-version: "3.10"
 
       - name: Download artifact
         uses: actions/download-artifact@v2
diff --git a/pyproject.toml b/pyproject.toml
index e11e9c8..7a61265 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,32 +1,39 @@
 [build-system]
-requires = [
-    "setuptools>=45",
-    "wheel",
-    "setuptools_scm>=6.2",
-]
+requires = ["setuptools>=45", "wheel", "setuptools_scm>=6.2"]
 build-backend = "setuptools.build_meta"
 
 [tool.poetry]
 name = "routingpy"
 version = "1.2.1"
 description = "One lib to route them all."
-authors = ["Nils Nolde <nils@gis-ops.com>", "Tim Ellersiek <tim@gis-ops.com>", "Christian Beiwinkel <christian@gis-ops.com>"]
+authors = [
+    "Nils Nolde <nils@gis-ops.com>",
+    "Tim Ellersiek <tim@gis-ops.com>",
+    "Christian Beiwinkel <christian@gis-ops.com>",
+]
 license = "Apache2"
 readme = 'README.rst'
 
 [tool.poetry.dependencies]
-python = "^3.8.0"
+python = "^3.9.0"
 requests = "^2.20.0"
 # For the Jupyter notebooks:
-shapely = {version = "^2.0.0", optional = true}
-ipykernel = {version = "^6.0.0", optional = true}
-matplotlib = {version = "^3.4.1", optional = true}
-contextily = {version = "^1.1.0", optional = true}
-geopandas = {version = "^0.8.2", optional = true}
-descartes = {version = "^1.0.0", optional = true}
+shapely = { version = "^2.0.0", optional = true }
+ipykernel = { version = "^6.0.0", optional = true }
+matplotlib = { version = "^3.4.1", optional = true }
+contextily = { version = "^1.1.0", optional = true }
+geopandas = { version = "^0.8.2", optional = true }
+descartes = { version = "^1.0.0", optional = true }
 
 [tool.poetry.extras]
-notebooks = ["shapely", "ipykernel", "geopandas", "contextily", "matplotlib", "descartes"]
+notebooks = [
+    "shapely",
+    "ipykernel",
+    "geopandas",
+    "contextily",
+    "matplotlib",
+    "descartes",
+]
 
 [tool.poetry.group.dev.dependencies]
 sphinx = "^4.4.0"
@@ -61,11 +68,7 @@ exclude = '''
 profile = "black"
 line_length = 105
 src_paths = ["routingpy", "tests"]
-skip = [
-    ".venv",
-    "build",
-    "dist",
-]
+skip = [".venv", "build", "dist"]
 
 [tool.ruff]
 # Enable the pycodestyle (`E`) and Pyflakes (`F`) rules by default.