diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index fbb9366e..115739ed 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -42,29 +42,29 @@ jobs:
 
     - name: Build just oldest and newest on PRs, all on tags
       shell: bash
-      # - Always omit musl 3.8 b/c NumPy does not provide wheels for it
       # - Always omit musllinux_aarch64 because it's slow and niche
+      # - Always skip free-threading wheels for now
       # - On PPs, omit musllinux for speed
-      # - On PRs, run just oldest and newest Python versions (and omit 3.8 aarch64)
+      # - On PRs, run just oldest and newest Python versions
       run: |
         if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-          CIBW_SKIP="cp38-* cp39-* cp310-* cp311-* cp38-*_aarch64 *musllinux*"
+          CIBW_SKIP="cp311-* cp312-* cp313-* cp314t-* *musllinux*"
         else
-          CIBW_SKIP="cp38-* *musllinux_aarch64"
+          CIBW_SKIP="cp314t-* *musllinux_aarch64"
         fi
         echo "CIBW_SKIP=$CIBW_SKIP" >> $GITHUB_ENV
         echo "Setting CIBW_SKIP=$CIBW_SKIP"
 
     - name: "Building ${{ matrix.os }} (${{ matrix.arch }}) wheels"
-      uses: pypa/cibuildwheel@v3.2.0
+      uses: pypa/cibuildwheel@v3.2.1
       env:
         CIBW_SKIP: ${{ env.CIBW_SKIP }}
         CIBW_ARCHS: ${{ matrix.arch }}
         CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
         CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
-        # Emulated testing is slow, so trust that the Python 3.12 test is good enough on aarch64
+        # Emulated testing is slow, so trust that the Python 3.14 test is good enough on aarch64
         # (takes about 5 minutes per wheel to build, and 5 minutes to test)
-        CIBW_TEST_SKIP: "cp39-*_aarch64 cp310-*_aarch64 cp311-*_aarch64"
+        CIBW_TEST_SKIP: "cp3{10,11,12,13}-*_aarch64"
         CIBW_TEST_GROUPS: dev
         CIBW_TEST_COMMAND: >
           python -c "import cftime; print(f'cftime v{cftime.__version__}')" &&
diff --git a/.github/workflows/tests_conda.yml b/.github/workflows/tests_conda.yml
index 48198cd9..6dd4ccdc 100644
--- a/.github/workflows/tests_conda.yml
+++ b/.github/workflows/tests_conda.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
+        python-version: [ "3.10", "3.11", "3.12", "3.13", "3.14" ]
         os: [windows-latest, ubuntu-latest, macos-latest]
         platform: [x64, x32]
         experimental: [false]
@@ -36,7 +36,7 @@ jobs:
           numpy>1.13.3
           cython>=0.29.20
           pytest
-          pytest-cov
+          coverage
     - name: Install unstable dependencies
       if: matrix.experimental == true
       shell: bash -l {0}
@@ -57,4 +57,5 @@ jobs:
     - name: Run Tests
       shell: bash -l {0}
       run: |
-        pytest -vv test
+        coverage run -m pytest -vv test
+        coverage report
diff --git a/pyproject.toml b/pyproject.toml
index 6e59c27a..05298983 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,27 +15,25 @@ classifiers = [
     'Operating System :: POSIX :: Linux',
     'Programming Language :: Python',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.8',
-    '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 = [
-    "numpy>1.13.3",
+    "numpy>=1.21.2",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 
 [dependency-groups]
 dev = [
     "check-manifest",
-    "coverage",
+    "coverage>=7.10.0",
     "coveralls",
     "cython>=0.29.20",
     "pytest",
-    "pytest-cov",
     "sphinx",
     "twine",
 ]
@@ -44,8 +42,7 @@ dev = [
 requires = [
     "setuptools>=77.0.1",
     "cython>=0.29.20",
-    "oldest-supported-numpy ; python_version < '3.9'",
-    "numpy>=2.0.0,<3 ; python_version >= '3.9'",
+    "numpy>=2.0.0,<3",
 ]
 build-backend = "setuptools.build_meta"
 
@@ -58,8 +55,6 @@ addopts = [
     "-ra",
     "-v",
     "--doctest-modules",
-    "--cov=cftime",
-    "--cov-report=term-missing",
 ]
 doctest_optionflags = [
     "NORMALIZE_WHITESPACE",
@@ -67,6 +62,7 @@ doctest_optionflags = [
 ]
 
 [tool.coverage.run]
+source = ["src"]
 relative_files = true
 branch = true
 plugins = [
@@ -84,6 +80,7 @@ omit = [
 ]
 
 [tool.coverage.report]
+show_missing = true
 exclude_lines = [
     "pragma: no cover",
     "def __repr__",