diff --git a/.flake8 b/.flake8
deleted file mode 100644
index b851f0e..0000000
--- a/.flake8
+++ /dev/null
@@ -1,5 +0,0 @@
-[flake8]
-ignore = E501,W503,E203
-exclude = .git,__pycache__,docs/source/conf.py,old,build,dist
-max-complexity = 14
-max-line-length = 90
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bbe0b8c..739c625 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,19 +8,24 @@ on:
     - '*'
   pull_request:
 env:
-  LATEST_PY_VERSION: '3.10'
+  LATEST_PY_VERSION: '3.12'
 
 jobs:
   tests:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version:
+        - '3.8'
+        - '3.9'
+        - '3.10'
+        - '3.11'
+        - '3.12'
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -52,34 +57,38 @@ jobs:
     runs-on: ubuntu-latest
     if: startsWith(github.event.ref, 'refs/tags') || github.event_name == 'release'
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ env.LATEST_PY_VERSION }}
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install flit
-          python -m pip install .
+          python -m pip install hatch
+          python -m hatch build
 
       - name: Set tag version
         id: tag
-        # https://stackoverflow.com/questions/58177786/get-the-current-pushed-tag-in-github-actions
-        run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}
+        run: |
+          echo "version=${GITHUB_REF#refs/*/}"
+          echo "version=${GITHUB_REF#refs/*/}" >> $GITHUB_OUTPUT
 
       - name: Set module version
         id: module
-        # https://stackoverflow.com/questions/58177786/get-the-current-pushed-tag-in-github-actions
-        run: echo ::set-output name=version::$(python -c 'from importlib.metadata import version; print(version("rio_viz"))')
+        run: |
+          hatch --quiet version
+          echo "version=$(hatch --quiet version)" >> $GITHUB_OUTPUT
 
       - name: Build and publish
-        if: steps.tag.outputs.tag == steps.module.outputs.version
+        if: ${{ steps.tag.outputs.version }} == ${{ steps.module.outputs.version}}
         env:
-          FLIT_USERNAME: ${{ secrets.PYPI_USERNAME }}
-          FLIT_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
-        run: flit publish
+          HATCH_INDEX_USER: ${{ secrets.PYPI_USERNAME }}
+          HATCH_INDEX_AUTH: ${{ secrets.PYPI_PASSWORD }}
+        run: |
+          python -m hatch publish
+
 
   publish-docker:
     needs: [tests]
@@ -104,8 +113,9 @@ jobs:
 
       - name: Set tag version
         id: tag
-        # https://stackoverflow.com/questions/58177786/get-the-current-pushed-tag-in-github-actions
-        run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}
+        run: |
+          echo "version=${GITHUB_REF#refs/*/}"
+          echo "version=${GITHUB_REF#refs/*/}" >> $GITHUB_OUTPUT
 
       # Push `latest` when commiting to main
       - name: Build and push
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 1726693..fd657db 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -4,26 +4,21 @@ repos:
     hooks:
       - id: validate-pyproject
 
-  - repo: https://github.com/psf/black
-    rev: 22.12.0
-    hooks:
-      - id: black
-        language_version: python
-
   - repo: https://github.com/PyCQA/isort
-    rev: 5.12.0
+    rev: 5.13.2
     hooks:
       - id: isort
         language_version: python
 
-  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.238
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.3.5
     hooks:
       - id: ruff
         args: ["--fix"]
+      - id: ruff-format
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.3.0
+    rev: v1.9.0
     hooks:
       - id: mypy
         language_version: python
diff --git a/CHANGES.md b/CHANGES.md
index f026aff..cc44495 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,10 @@
+# 0.12.2 (2024-04-24)
+
+* update titiler dependency to `>=0.16,<0.19`
+* add python 3.12 official support
+* change code formatter to `ruff-format`
+* switch to Hatch
+
 # 0.12.1 (2024-01-12)
 
 * fix invalid nodata overwriting
diff --git a/pyproject.toml b/pyproject.toml
index 0439af7..c9fcd4a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,13 +15,14 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering :: GIS",
 ]
 dynamic = ["version"]
 dependencies = [
     "braceexpand",
     "rio-cogeo>=5.0",
-    "titiler.core>=0.16.0,<0.17",
+    "titiler.core>=0.16.0,<0.19",
     "starlette-cramjam>=0.3,<0.4",
     "uvicorn",
     "server-thread>=0.2.0",
@@ -48,19 +49,25 @@ Source = "https://github.com/developmentseed/rio-viz"
 viz = "rio_viz.scripts.cli:viz"
 
 [build-system]
-requires = ["flit>=3.2,<4"]
-build-backend = "flit_core.buildapi"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.flit.module]
-name = "rio_viz"
+[tool.hatch.version]
+path = "rio_viz/__init__.py"
 
-[tool.flit.sdist]
+[tool.hatch.build.targets.sdist]
 exclude = [
-    "tests/",
-    "docs/",
-    ".github/",
-    "CHANGES.md",
-    "CONTRIBUTING.md",
+  "/tests",
+  ".ruff_cache/",
+  "examples/",
+  ".github",
+  ".history",
+  ".bumpversion.cfg",
+  ".gitignore",
+  "Dockerfile",
+  ".pre-commit-config.yaml",
+  "CHANGES.md",
+  "CONTRIBUTING.md",
 ]
 
 [tool.isort]
@@ -74,10 +81,14 @@ default_section = "THIRDPARTY"
 no_strict_optional = true
 
 [tool.ruff]
+line-length = 90
+
+[tool.ruff.lint]
 select = [
     "D1",  # pydocstyle errors
     "E",  # pycodestyle errors
     "W",  # pycodestyle warnings
+    "F",  # flake8
     "C",  # flake8-comprehensions
     "B",  # flake8-bugbear
 ]
@@ -85,4 +96,8 @@ ignore = [
     "E501",  # line too long, handled by black
     "B008",  # do not perform function calls in argument defaults
     "B905",  # ignore zip() without an explicit strict= parameter, only support with python >3.10
+    "B028",
 ]
+
+[tool.ruff.lint.mccabe]
+max-complexity = 12
diff --git a/rio_viz/app.py b/rio_viz/app.py
index dafa64b..e7bfd4f 100644
--- a/rio_viz/app.py
+++ b/rio_viz/app.py
@@ -1,6 +1,5 @@
 """rio_viz app."""
 
-import pathlib
 import urllib.parse
 from typing import Any, Dict, List, Literal, Optional, Tuple, Type, Union
 
@@ -68,9 +67,9 @@ class viz:
     """Creates a very minimal slippy map tile server using fastAPI + Uvicorn."""
 
     src_path: str = attr.ib()
-    reader: Union[
-        Type[BaseReader], Type[MultiBandReader], Type[MultiBaseReader]
-    ] = attr.ib(default=Reader)
+    reader: Union[Type[BaseReader], Type[MultiBandReader], Type[MultiBaseReader]] = (
+        attr.ib(default=Reader)
+    )
 
     app: FastAPI = attr.ib(default=attr.Factory(FastAPI))
 
@@ -616,9 +615,7 @@ def tilejson(
 
             with self.reader(self.src_path) as src_dst:  # type: ignore
                 bounds = (
-                    self.bounds
-                    if self.bounds is not None
-                    else src_dst.geographic_bounds
+                    self.bounds if self.bounds is not None else src_dst.geographic_bounds
                 )
                 minzoom = self.minzoom if self.minzoom is not None else src_dst.minzoom
                 maxzoom = self.maxzoom if self.maxzoom is not None else src_dst.maxzoom
@@ -678,9 +675,7 @@ def wmts(
 
             with self.reader(self.src_path) as src_dst:  # type: ignore
                 bounds = (
-                    self.bounds
-                    if self.bounds is not None
-                    else src_dst.geographic_bounds
+                    self.bounds if self.bounds is not None else src_dst.geographic_bounds
                 )
                 minzoom = self.minzoom if self.minzoom is not None else src_dst.minzoom
                 maxzoom = self.maxzoom if self.maxzoom is not None else src_dst.maxzoom
@@ -699,9 +694,9 @@ def wmts(
                 tileMatrix.append(tm)
 
             return templates.TemplateResponse(
-                "wmts.xml",
-                {
-                    "request": request,
+                request,
+                name="wmts.xml",
+                context={
                     "tiles_endpoint": tiles_endpoint,
                     "bounds": bounds,
                     "tileMatrix": tileMatrix,
@@ -738,9 +733,9 @@ def map_viewer(
                 tilejson_url += f"?{request.query_params}"
 
             return templates.TemplateResponse(
+                request,
                 name="map.html",
                 context={
-                    "request": request,
                     "tilejson_endpoint": tilejson_url,
                 },
                 media_type="text/html",
@@ -768,9 +763,9 @@ def viewer(request: Request):
                 name = "assets.html"
 
             return templates.TemplateResponse(
+                request,
                 name=name,
                 context={
-                    "request": request,
                     "tilejson_endpoint": str(request.url_for("tilejson")),
                     "stats_endpoint": str(request.url_for("statistics")),
                     "info_endpoint": str(request.url_for("info")),
diff --git a/rio_viz/io/mosaic.py b/rio_viz/io/mosaic.py
index ed2752d..d88e33b 100644
--- a/rio_viz/io/mosaic.py
+++ b/rio_viz/io/mosaic.py
@@ -101,9 +101,9 @@ def point(
         def _reader(asset: str, lon: float, lat: float, **kwargs) -> PointData:
             return self.datasets[asset].point(lon, lat, **kwargs)
 
-        return mosaic_point_reader(
-            mosaic_assets, _reader, lon, lat, threads=0, **kwargs
-        )[0]
+        return mosaic_point_reader(mosaic_assets, _reader, lon, lat, threads=0, **kwargs)[
+            0
+        ]
 
     def info(self) -> Info:
         """info."""