diff --git a/.github/workflows/release_pypi.yaml b/.github/workflows/release_pypi.yaml
index 7f442a68..bb2ae2fc 100644
--- a/.github/workflows/release_pypi.yaml
+++ b/.github/workflows/release_pypi.yaml
@@ -2,36 +2,218 @@ name: Release PyPi
 
 on:
   workflow_dispatch:
-  release:
-    types:
-      - created
+# release:
+#   types:
+#     - created
+  pull_request:
+    branches: [main]
 
 jobs:
-  build_wheels:
-    name: Build wheels on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
+  linux:
+    name: Build ${{ matrix.platform.runner}} ${{ matrix.platform.target }}
+    runs-on: ${{ matrix.platform.runner }}
     strategy:
       matrix:
-        # FIXME: rather do one job by OS
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        platform:
+          # older ubuntu to avoid messing with glibc version
+          - runner: ubuntu-22.04
+            target: x86_64
+            manylinux: auto
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+          - runner: ubuntu-22.04
+            target: aarch64
+            manylinux: manylinux_2_28
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+
     steps:
       - uses: actions/checkout@v3
+
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
-      # - name: Set up Rust
-      #   uses: dtolnay/rust-toolchain@stable
-      # - uses: Swatinem/rust-cache@v2
-      - name: Build wheels with Maturin
+          python-version: "3.13"
+
+      - run: pip install -U twine
+
+      - name: Install required packages
+        run: |
+          sudo apt update
+          sudo apt install pkg-config gcc-aarch64-linux-gnu g++-aarch64-linux-gnu -qy
+
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+          target: ${{ matrix.platform.target}}-unknown-linux-gnu
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --interpreter ${{ matrix.platform.interpreter }} --features python-bindings
+          sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
+          manylinux: ${{ matrix.platform.manylinux }}
+
+      - name: Validate Python package distributions
+        run: twine check --strict dist/*
+
+      - name: Install built wheel
+        if: matrix.platform.target == 'x86_64'
+        run: |
+          pip install outlines_core --no-index --find-links dist --force-reinstall
+          python -c "import outlines_core"
+
+      - uses: actions/upload-artifact@v4
+        with:
+          path: dist/*.whl
+          name: wheels-linux-${{ matrix.platform.target }}
+
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: wheels-*
+          merge-multiple: true
+          path: dist
+
+      - run: ls -R dist
+
+  windows:
+    name: Build ${{ matrix.platform.runner}} ${{ matrix.platform.target }}
+    runs-on: ${{ matrix.platform.runner }}
+    strategy:
+      matrix:
+        platform:
+          - runner: windows-latest
+            target: x86
+            alias-target: i686-pc-windows-msvc
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+          - runner: windows-latest
+            target: x64
+            alias-target: x86_64-pc-windows-msvc
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+          architecture: ${{ matrix.platform.target }}
+
+      - run: pip install -U twine
+
+      - name: Install required packages
+        # rustls requires aws-lc-sys, which FFI bindings to AWS-LC (AWS Libcrypto)
+        # aws-lc-sys requires nasm for compilation on windows
+        run: |
+          choco install nasm
+
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+          target: ${{ matrix.platform.alias-target}}
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --interpreter ${{ matrix.platform.interpreter }} --features python-bindings
+          sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
+          manylinux: auto
+
+      - name: Validate Python package distributions
+        run: twine check --strict dist/*
+
+      - name: Install built wheel
+        run: |
+          pip install outlines_core --no-index --find-links dist --force-reinstall
+          python -c "import outlines_core"
+
+      - uses: actions/upload-artifact@v4
+        with:
+          path: dist/*.whl
+          name: wheels-windows-${{ matrix.platform.target }}
+
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: wheels-*
+          merge-multiple: true
+          path: dist
+
+      - run: ls -R dist
+
+  macos:
+    name: Build ${{ matrix.platform.runner}} ${{ matrix.platform.target }}
+    runs-on: ${{ matrix.platform.runner }}
+    strategy:
+      matrix:
+        platform:
+          - runner: macos-14
+            target: x86_64
+            macos_version: "14.0"
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+          - runner: macos-14
+            target: aarch64
+            macos_version: "14.0"
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+          - runner: macos-15
+            target: x86_64
+            macos_version: "15.0"
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+          - runner: macos-15
+            target: aarch64
+            macos_version: "15.0"
+            interpreter: "3.9 3.10 3.11 3.12 3.13"
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - run: pip install -U twine
+
+      - name: Set macOS version
+        run: echo "MACOSX_DEPLOYMENT_TARGET=${{ matrix.platform.macos_version }}" >> $GITHUB_ENV
+
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+          target: ${{ matrix.platform.target}}-apple-darwin
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Build wheels
         uses: PyO3/maturin-action@v1
         with:
-          command: build
-          args: --release --out dist # --features python-bindings
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --interpreter ${{ matrix.platform.interpreter }} --features python-bindings
+          sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
+          manylinux: auto
+
+      - name: Validate Python package distributions
+        run: twine check --strict dist/*
+
+      - name: Install built wheel
+        if: matrix.platform.target == 'aarch64'
+        run: |
+          pip install outlines_core --no-index --find-links dist --force-reinstall
+          python -c "import outlines_core"
+
       - uses: actions/upload-artifact@v4
         with:
           path: dist/*.whl
-          name: wheels-${{ matrix.os }}
+          name: wheels-${{ matrix.platform.runner }}-${{ matrix.platform.target }}
+
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: wheels-*
+          merge-multiple: true
+          path: dist
+
+      - run: ls -R dist
 
   build_sdist:
     name: Build source distribution
@@ -52,6 +234,13 @@ jobs:
           path: dist/*.tar.gz
           name: sdist
 
+      - uses: actions/download-artifact@v4
+        with:
+          name: sdist
+          path: dist
+
+      - run: ls -R dist
+
   # release:
   #   name: Release to PyPI
   #   needs: [build_wheels, build_sdist]
@@ -66,6 +255,7 @@ jobs:
   #       with:
   #         name: sdist
   #         path: dist
+
   #     - name: Publish to PyPI
   #       uses: pypa/gh-action-pypi-publish@v1.5.0
   #       with:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 20330a34..215f0111 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -37,10 +37,9 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Set up test environment
       run: |
-        # python -m venv .venv
-        # source .venv/bin/activate
-        # echo "VIRTUAL_ENV=$(pwd)/.venv" >> $GITHUB_ENV
-        # echo "$(pwd)/.venv/bin" >> $GITHUB_PATH
+        python -m venv .venv
+        source .venv/bin/activate
+        python -m pip install --upgrade pip
         pip install .[test]
         maturin develop
     - name: Create matrix id
@@ -54,7 +53,7 @@ jobs:
         echo "::set-output name=id::$MATRIX_ID"
     - name: Run tests
       run: |
-        pytest --cov=outlines_core -vv
+        .venv/bin/python -m pytest --cov=outlines_core -vv
       env:
         COVERAGE_FILE: .coverage.${{ steps.matrix-id.outputs.id }}
     - name: Upload coverage data
@@ -84,7 +83,11 @@ jobs:
 
       - name: Set up environment
         run: |
-          pip install --upgrade "coverage[toml]>=5.1" diff-cover
+          python -m venv .venv
+          source .venv/bin/activate
+          python -m pip install --upgrade pip
+          pip install --upgrade "coverage[toml]>=5.1" diff-cover maturin
+          maturin develop
 
       - name: Install lcov
         run: sudo apt-get update && sudo apt-get install -yqq lcov
diff --git a/Cargo.toml b/Cargo.toml
index 32ffa8f7..a93598a7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,12 +16,22 @@ serde-pyobject = { version = "0.5.0", optional = true }
 serde_json = { version = "1.0", features = ["preserve_order"] }
 serde = {version = "1.0", features = ["derive"]}
 bincode = "2.0.0-rc.3"
-# Fragile dependencies, minor updates often break the code
-hf-hub = "=0.3.2"
-tokenizers = { version = "=0.20.3", features = ["http"] }
 rustc-hash = "2.1.0"
 regex-automata = "0.4.9"
 
+# Below are fragile dependencies, even minor updates of which often break the code
+[dependencies.hf-hub]
+version = "=0.4.1"
+features = ["ureq", "rustls-tls"]
+default-features = false
+
+[dependencies.tokenizers]
+git = "https://github.com/huggingface/tokenizers.git"
+# This is a version > 0.21.0 before 0.21.1, we're looking for rustls-tls feature
+# Once released could be pinned to 0.21.1+
+rev = "4f1a810aa258d287e6936315e63fbf58bde2a980"
+features = ["http", "rustls-tls"]
+
 [features]
 python-bindings = ["pyo3", "serde-pyobject"]
 
diff --git a/environment.yml b/environment.yml
index d3777345..9ee3f305 100644
--- a/environment.yml
+++ b/environment.yml
@@ -12,7 +12,6 @@ dependencies:
   - pydantic
   - pytest
   - pre-commit
-  - jsonschema
   - pip
   - pip:
     - -e ".[test]"
diff --git a/pyproject.toml b/pyproject.toml
index 5179829a..96c7adfe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,9 +23,6 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Topic :: Scientific/Engineering :: Artificial Intelligence",
 ]
-dependencies = [
-   "jsonschema",
-]
 dynamic = ["version"]
 
 [project.optional-dependencies]
@@ -42,7 +39,7 @@ test = [
     "scipy",
     "asv",
     "psutil",
-    "maturin",
+    "maturin[patchelf]",
 ]
 
 [project.urls]
@@ -54,9 +51,6 @@ repository = "https://github.com/dottxt-ai/outlines-core"
 file="README.md"
 content-type = "text/markdown"
 
-[tool.cibuildwheel]
-skip = ["*-musllinux_i686"]
-
 [tool.setuptools]
 packages = ["outlines_core"]
 package-dir = {"" = "python"}
@@ -86,7 +80,6 @@ explicit_package_bases = true
 
 [[tool.mypy.overrides]]
 module = [
-    "jsonschema.*",
     "pydantic.*",
     "pytest",
     "setuptools.*",
diff --git a/src/python_bindings/mod.rs b/src/python_bindings/mod.rs
index 548ff1d3..64148cb2 100644
--- a/src/python_bindings/mod.rs
+++ b/src/python_bindings/mod.rs
@@ -337,7 +337,9 @@ pub fn build_regex_from_schema_py(
 }
 
 fn register_child_module(parent_module: &Bound<'_, PyModule>) -> PyResult<()> {
-    let m = PyModule::new_bound(parent_module.py(), "json_schema")?;
+    let m = PyModule::new(parent_module.py(), "json_schema")?;
+    parent_module.add_submodule(&m)?;
+
     m.add("BOOLEAN", json_schema::BOOLEAN)?;
     m.add("DATE", json_schema::DATE)?;
     m.add("DATE_TIME", json_schema::DATE_TIME)?;
@@ -352,16 +354,21 @@ fn register_child_module(parent_module: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add("EMAIL", json_schema::EMAIL)?;
     m.add("URI", json_schema::URI)?;
     m.add_function(wrap_pyfunction!(build_regex_from_schema_py, &m)?)?;
-    parent_module.add_submodule(&m)?;
+
+    let sys = PyModule::import(m.py(), "sys")?;
+    let sys_modules_bind = sys.as_ref().getattr("modules")?;
+    let sys_modules = sys_modules_bind.downcast::<PyDict>()?;
+    sys_modules.set_item("outlines_core.json_schema", &m)?;
+
     Ok(())
 }
 
-// FIXME: there's an unwanted outlines_core.outlines_core module generated by PyO3...
 #[pymodule]
 fn outlines_core(m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<PyIndex>()?;
     m.add_class::<PyVocabulary>()?;
     m.add_class::<PyGuide>()?;
     register_child_module(m)?;
+
     Ok(())
 }
diff --git a/src/vocabulary/mod.rs b/src/vocabulary/mod.rs
index 43bb6e7a..e2824c50 100644
--- a/src/vocabulary/mod.rs
+++ b/src/vocabulary/mod.rs
@@ -160,7 +160,7 @@ impl Vocabulary {
                 NormalizerWrapper::Sequence(normalization_sequence) => {
                     let new_sequence = Sequence::new(
                         normalization_sequence
-                            .get_normalizers()
+                            .as_ref()
                             .iter()
                             .filter_map(|normalizer| match normalizer {
                                 NormalizerWrapper::Prepend(_) => None,
@@ -465,7 +465,7 @@ mod tests {
             if let Some(n) = normalized_t.get_normalizer() {
                 match n {
                     NormalizerWrapper::Sequence(seq) => {
-                        for n in seq.get_normalizers() {
+                        for n in seq.as_ref() {
                             if let NormalizerWrapper::Prepend(_) = n {
                                 unreachable!()
                             }