diff --git a/.github/workflows/run-test.yml b/.github/workflows/run-test.yml
index 3e342bc..e1dded0 100644
--- a/.github/workflows/run-test.yml
+++ b/.github/workflows/run-test.yml
@@ -13,7 +13,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - name: Build irspack (ubuntu)
         run: |
           pip install --upgrade pip setuptools wheel
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 6fc1ccb..c63677f 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: actions/setup-python@v3
         name: Install Python
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - name: Build sdist
         run: pip install build && python -m build --sdist
       - uses: actions/upload-artifact@v4
@@ -41,10 +41,6 @@ jobs:
             runs-on: windows-latest
             cibw:
               cflags: ''
-          - os: macos-intel
-            runs-on: macos-13
-            cibw:
-              cflags: ''
           - os: macos-arm
             runs-on: macos-latest
             cibw:
@@ -55,7 +51,7 @@ jobs:
           submodule: recursive
           fetch-depth: 0
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.0.1
+        uses: pypa/cibuildwheel@v3.4.0
         env:
           CIBW_PLATFORM: ${{ matrix.platform || 'auto' }}
           CFLAGS: ${{ matrix.cibw.cflags }}
diff --git a/Readme.md b/Readme.md
index 126a532..198266f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -34,7 +34,7 @@ The binaries have been compiled to use AVX instruction. If you want to use AVX2/
 CFLAGS="-march=native" pip install git+https://github.com/tohtsky/irspack.git
 ```
 
-In that case, you must have a decent version of C++ compiler (with C++11 support). If it doesn't work, feel free to make an issue!
+In that case, you must have a decent version of C++ compiler (with C++17 support). If it doesn't work, feel free to make an issue!
 
 ## Optional Dependencies
 
diff --git a/pyproject.toml b/pyproject.toml
index 9f18b3f..01da244 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,11 +11,11 @@ requires-python = ">=3.9"
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Scientific/Engineering",
 ]
 dependencies = [