diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index 4b5a0ec1..1eeb9c63 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -22,29 +22,30 @@ jobs:
 
     steps:
       # Note: the action happens inside a docker image
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up QEMU
         if: runner.os == 'Linux'
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@v4
         with:
           platforms: all
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.22.0
+        uses: pypa/cibuildwheel@v4.2.1
         env:
-          CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
-          CIBW_MANYLINUX_I686_IMAGE: manylinux2014
-          CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
+          CIBW_MANYLINUX_X86_64_IMAGE: manylinux_2_28
+          CIBW_MANYLINUX_AARCH64_IMAGE: manylinux_2_28
           CIBW_ARCHS_LINUX: auto aarch64
-          CIBW_SKIP: "cp36-* pp* *-win32 *-manylinux_i686 *musllinux*"
-          CIBW_BEFORE_BUILD_LINUX: yum install -y libunwind-devel elfutils-libelf-devel libdwarf-devel
+          # cp3*t-*: free-threaded CPython is built by default since
+          # cibuildwheel 4, but vmprof does not support it
+          CIBW_SKIP: "pp* cp3*t-* *-win32 *-manylinux_i686 *musllinux*"
+          CIBW_BEFORE_BUILD_LINUX: dnf install -y libunwind-devel
           CIBW_BEFORE_TEST: pip install -r test_requirements.txt
           CIBW_TEST_COMMAND: cd {package} && pytest vmprof jitlog -vv
           CIBW_TEST_COMMAND_WINDOWS: cd /d {package} && pytest vmprof jitlog -vv
           CIBW_TEST_SKIP: "*-*linux_{aarch64,ppc64le,s390x}"
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: ${{ matrix.os }}
           path: ./wheelhouse/*.whl
@@ -58,8 +59,8 @@ jobs:
 
     steps:
       # Note: not inside a docker
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v7
+      - uses: actions/setup-python@v7
         with:
           python-version: 'pypy-3.11'
 
@@ -92,7 +93,7 @@ jobs:
           pypy -m build --sdist .
 
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           path: |
             vmprof*.whl
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7ea1dc6a..87e3d459 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,7 +18,7 @@ jobs:
       matrix:
         # Test all supported versions on Ubuntu:
         os: [ubuntu-latest]
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "pypy-3.11"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.15.0-rc.2", "pypy-3.11"]
         experimental: [false]
           # include:
           #   - os: macos-latest
@@ -28,13 +28,13 @@ jobs:
           #     python: "3.10"
           #     experimental: false
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v7
     - name: Install libunwind
       run: |
         sudo apt install -y libunwind-dev
         pkg-config libunwind --cflags --libs-only-l
     - name: Set up Python ${{ matrix.python }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v7
       with:
         python-version: ${{ matrix.python }}
     - name: Install
diff --git a/jitlog/marks.py b/jitlog/marks.py
index 47450877..1b425476 100644
--- a/jitlog/marks.py
+++ b/jitlog/marks.py
@@ -100,7 +100,7 @@ def read_resop(ctx, trace, fileobj):
     op = FlatOp(opnum, opname, args, result, None, -1, failargs=failargs)
     trace.add_instr(op)
 
-TOKEN_REGEX = re.compile("TargetToken\((\d+)\)")
+TOKEN_REGEX = re.compile(r"TargetToken\((\d+)\)")
 
 @mark_parser(
     1,
diff --git a/setup.py b/setup.py
index a08d79c6..d36c9f1f 100644
--- a/setup.py
+++ b/setup.py
@@ -126,7 +126,7 @@ def _supported_unix():
     name='vmprof',
     author='vmprof team',
     author_email='fijal@baroquesoftware.com',
-    version="0.4.18.1",
+    version="0.4.19",
     packages=find_packages(),
     description="Python's vmprof client",
     long_description='See https://vmprof.readthedocs.org/',
@@ -138,7 +138,7 @@ def _supported_unix():
         'pytz',
         'colorama',
     ] + extra_install_requires,
-    python_requires='<3.15',
+    python_requires='<3.16',
     tests_require=['pytest','cffi','hypothesis'],
     entry_points = {
         'console_scripts': [
@@ -155,4 +155,4 @@ def _supported_unix():
     zip_safe=False,
     include_package_data=True,
     ext_modules=ext_modules,
-)
\ No newline at end of file
+)
diff --git a/vmprof/__main__.py b/vmprof/__main__.py
index 54d7cc11..fae421cf 100644
--- a/vmprof/__main__.py
+++ b/vmprof/__main__.py
@@ -42,8 +42,8 @@ def main():
         output_mode = OUTPUT_CLI
 
     if output_mode == OUTPUT_FILE:
-        prof_file = args.output
-        prof_name = prof_file.name
+        prof_file = open(args.output, 'w+b')
+        prof_name = args.output
     else:
         prof_file = tempfile.NamedTemporaryFile(delete=False)
         prof_name = prof_file.name
diff --git a/vmprof/cli.py b/vmprof/cli.py
index 5f067a17..65021b53 100644
--- a/vmprof/cli.py
+++ b/vmprof/cli.py
@@ -29,7 +29,7 @@ def build_argparser():
 
     parser.add_argument(
         '--config',
-        type=argparse.FileType('r'),
+        metavar='file.ini',
     )
 
     parser.add_argument(
@@ -80,7 +80,6 @@ def build_argparser():
     output_mode_args.add_argument(
         '--output', '-o',
         metavar='file.prof',
-        type=argparse.FileType('w+b'),
         help='Save profiling data to file'
     )
 
@@ -101,7 +100,8 @@ def parse_args(argv):
             ('no-native', bool),
         ]
 
-        ini_parser = IniParser(args.config)
+        with open(args.config) as f:
+            ini_parser = IniParser(f)
 
         for name, type in ini_options:
             argname = name.replace("-", "_")
diff --git a/vmprof/test/test_config.py b/vmprof/test/test_config.py
index 591fc648..3de21fa8 100644
--- a/vmprof/test/test_config.py
+++ b/vmprof/test/test_config.py
@@ -59,7 +59,7 @@ def test_parser_without_section():
         'example.py'
     ])
 
-    assert test_file == args.config.name
+    assert test_file == args.config
     assert args.no_native == True