diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 11f1cf38..e6b139df 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         # Checkout pull request HEAD commit instead of merge commit
         ref: ${{ github.event.pull_request.head.sha }}
@@ -26,14 +26,14 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13-dev"]
       fail-fast: false
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -50,7 +50,7 @@ jobs:
     name: "test (aarch64, ${{ matrix.pyver }})"
     strategy:
       matrix:
-        pyver: [cp37-cp37m, cp38-cp38, cp39-cp39, cp310-cp310]
+        pyver: [cp312-cp312]
       fail-fast: false
     runs-on: ubuntu-latest
     env:
@@ -58,7 +58,7 @@ jobs:
       img: quay.io/pypa/manylinux2014_aarch64
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Set up QEMU
       id: qemu
       uses: docker/setup-qemu-action@v3
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 276e8dcc..80739a0d 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -41,7 +41,7 @@ jobs:
           python-version: '3.8'
 
       - name: Build wheels
-        uses: joerick/cibuildwheel@v2.19.1
+        uses: joerick/cibuildwheel@v2.19
         env:
           CIBW_SKIP: pp*
           CIBW_ARCHS: ${{matrix.archs}}
@@ -77,14 +77,17 @@ jobs:
     runs-on: ubuntu-latest
     # upload to PyPI on every tag starting with 'v'
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')
+    environment:
+      name: pypi
+      url: https://pypi.org/p/pyinstrument
+    permissions:
+      id-token: write
+      attestations: write
+
     steps:
       - uses: actions/download-artifact@v2
         with:
           name: artifact
           path: dist
 
-      - uses: pypa/gh-action-pypi-publish@master
-        with:
-          user: __token__
-          password: ${{ secrets.pypi_password }}
-          # To test: repository_url: https://test.pypi.org/legacy/
+      - uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/README.md b/README.md
index 0ad0b9a7..539d8030 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Installation
 
     pip install pyinstrument
 
-Pyinstrument supports Python 3.7+.
+Pyinstrument supports Python 3.8+.
 
 <!-- MARK installation end -->
 
diff --git a/noxfile.py b/noxfile.py
index 69f74f7b..d8abd320 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,7 +1,7 @@
 import nox
 
 
-@nox.session(python=["3.7", "3.8", "3.9"])
+@nox.session(python=["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"])
 def test(session):
-    session.install("-r", "requirements-dev.txt")
+    session.install("-e", ".[test]")
     session.run("pytest")
diff --git a/pyinstrument/low_level/stat_profile.c b/pyinstrument/low_level/stat_profile.c
index 0036d50c..b5dd43d1 100644
--- a/pyinstrument/low_level/stat_profile.c
+++ b/pyinstrument/low_level/stat_profile.c
@@ -30,6 +30,7 @@ These timer functions are mostly stolen from timemodule.c
 
 #if defined(MS_WINDOWS) && !defined(__BORLANDC__)
 #include <windows.h>
+#include <time.h> // for clock()
 
 /* use QueryPerformanceCounter on Windows */
 
@@ -333,19 +334,19 @@ _get_class_name_of_frame(PyFrameObject *frame, PyCodeObject *code) {
 
     PyObject *locals = PyFrame_GetLocals(frame);
 
-    if (!PyDict_Check(locals)) {
+    if (!PyMapping_Check(locals)) {
         Py_DECREF(locals);
         return NULL;
     }
 
     if (has_self) {
-        PyObject *self = PyDict_GetItem(locals, SELF_STRING);
+        PyObject *self = PyObject_GetItem(locals, SELF_STRING);
         if (self) {
             result = _PyType_Name(self->ob_type);
         }
     }
     else if (has_cls) {
-        PyObject *cls = PyDict_GetItem(locals, CLS_STRING);
+        PyObject *cls = PyObject_GetItem(locals, CLS_STRING);
         if (cls) {
             if (PyType_Check(cls)) {
                 PyTypeObject *type = (PyTypeObject *)cls;
diff --git a/pyproject.toml b/pyproject.toml
index eab21fc8..bbbc40b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ line-length = 100
 [tool.pyright]
 include = ["pyinstrument", "test"]
 ignore = ["pyinstrument/vendor"]
-pythonVersion = "3.7"
+pythonVersion = "3.8"
 
 [tool.isort]
 profile = "black"
diff --git a/setup.py b/setup.py
index 6012be3a..01269f16 100644
--- a/setup.py
+++ b/setup.py
@@ -29,9 +29,10 @@
             "pytest",
             "flaky",
             "trio",
-            "greenlet>=3.0.0a1",
+            "cffi >= v1.17.0rc1 ; python_version >= '3.13'",  # trio dep, pinned to a version that works with py3.13
+            "greenlet>=3.0.0a1 ; python_version < '3.13'",
+            "greenlet @ https://github.com/vstinner/greenlet/archive/refs/heads/py313.zip ; python_version >= '3.13'",
             "pytest-asyncio==0.12.0",  # pinned to an older version due to an incompatibility with flaky
-            "sphinx-autobuild==2021.3.14",
             "ipython",
         ],
         "bin": [
@@ -39,10 +40,11 @@
             "nox",
         ],
         "docs": [
-            "sphinx==4.2.0",
-            "myst-parser==0.15.1",
-            "furo==2021.6.18b36",
+            "sphinx==7.4.7",
+            "myst-parser==3.0.1",
+            "furo==2024.7.18",
             "sphinxcontrib-programoutput==0.17",
+            "sphinx-autobuild==2024.4.16",
         ],
         "examples": [
             "numpy",
@@ -53,7 +55,7 @@
         ],
     },
     include_package_data=True,
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     entry_points={"console_scripts": ["pyinstrument = pyinstrument.__main__:main"]},
     zip_safe=False,
     classifiers=[