diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f5fe6e3..fedc295 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-11]
+        os:
+          - ubuntu-20.04
+          - ubuntu-24.04
+          - windows-2019
+          - macos-11
 
     steps:
       - uses: actions/checkout@v4
@@ -23,7 +27,7 @@ jobs:
         uses: pypa/cibuildwheel@v2.16.2
         env:
           CIBW_ARCHS: all
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           path: ./wheelhouse/*.whl
 
@@ -34,6 +38,6 @@ jobs:
     - uses: actions/checkout@v4
     - name: Build SDist
       run: pipx run build --sdist
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
-        path: dist/*.tar.gz
\ No newline at end of file
+        path: dist/*.tar.gz
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c7a9dbb..a48ab7c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,13 +4,19 @@ on:
 name: Test
 jobs:
   pytest:
+    strategy:
+      matrix:
+        python-version:
+          - "3.10"
+          - "3.12"
+          - "3.13"
     name: pytest
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: ${{ matrix.python-version }}
           architecture: "x64"
       - run: python -m pip install -U pip wheel setuptools
       - run: python -m pip install -r test-requirements.txt
diff --git a/bencoder.pyx b/bencoder.pyx
index 6bd214d..9571418 100644
--- a/bencoder.pyx
+++ b/bencoder.pyx
@@ -149,7 +149,7 @@ cdef encode_dict(x, list r):
 encode_func = {
     int: encode_int,
     bool: encode_int,    
-    long: encode_long,
+    int: encode_long,
     bytes: encode_bytes,
     str: encode_string,
     list: encode_list,
diff --git a/pyproject.toml b/pyproject.toml
index f890cb0..8da8fa3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["cython>=0.29.32", "setuptools>=58.0", "wheel"]
+requires = ["cython>=3", "setuptools>=58.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [tool.cibuildwheel]