diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index ce9fd19..7832a69 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -28,8 +28,8 @@ jobs:
             target: x86_64
           - runner: ubuntu-22.04
             target: x86
-          # - runner: ubuntu-22.04
-          #   target: aarch64
+          - runner: ubuntu-22.04
+            target: aarch64
           - runner: ubuntu-22.04
             target: armv7
           # - runner: ubuntu-22.04
@@ -45,7 +45,7 @@ jobs:
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
-          args: --release --out dist --find-interpreter
+          args: -F python-binding --release --out dist --find-interpreter
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
           manylinux: auto
       - name: Upload wheels
@@ -76,7 +76,7 @@ jobs:
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
-          args: --release --out dist --find-interpreter
+          args: -F python-binding --release --out dist --find-interpreter
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
           manylinux: musllinux_1_2
       - name: Upload wheels
diff --git a/pyproject.toml b/pyproject.toml
index a89a2e6..5836c58 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,10 +16,10 @@ description = "OpenAI's response format for its open-weight model series gpt-oss
 readme = "README.md"
 
 [project.optional-dependencies]
-demo = ["uvicorn", "fastapi"]
+demo = []
 
 [tool.maturin]
-features = ["pyo3/extension-module"]
+features = ["python-binding", "pyo3/extension-module"]
 module-name = "openai_harmony"
 python-source = "python"