diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a38b706a..5344d66e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,24 +21,24 @@ jobs:
       matrix:
         # Test all supported versions on Ubuntu:
         os: [ubuntu-latest, ubuntu-24.04-arm]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14", "3.15"]
         experimental: [false]
         build: ['']
         include:
           # As the experimental task for the dev version.
           - os: ubuntu-latest
-            python: "3.14"
+            python: "3.15"
             experimental: true
             build: 'free-threading'
           - os: ubuntu-24.04-arm
-            python: "3.14"
+            python: "3.15"
             experimental: true
             build: 'free-threading'
           - os: ubuntu-latest
-            python: "3.15-dev"
+            python: "3.16-dev"
             experimental: true
           - os: ubuntu-latest
-            python: "3.15-dev"
+            python: "3.16-dev"
             experimental: true
             build: 'free-threading'
           # Also test PyPy, macOS, and Windows:
@@ -46,10 +46,10 @@ jobs:
             python: pypy-3.11
             experimental: false
           - os: macos-latest
-            python: "3.14"
+            python: "3.15"
             experimental: true
           - os: windows-latest
-            python: "3.14"
+            python: "3.15"
             experimental: false
     steps:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
diff --git a/doc/changelog.rst b/doc/changelog.rst
index 8735b3bb..6e0adfd3 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -1,7 +1,13 @@
 Changelog
 =========
 
-Version 1.14.0
+Version 1.15.0 (unreleased)
+--------------
+* Add support for Python 3.15 and drop 3.10
+* Bump tornado to 6.6 (fixes ``BufferError`` on PyPy)
+* Bump genshi to 0.7.12 (fixes ``TypeError`` on Python 3.15)
+
+Version 1.14.0 (2026-02-07)
 --------------
 * Bump ``pyperf`` to 2.10.0
 * Add base64 module benchmark (b64, b32, b16, a85, b85)
diff --git a/doc/conf.py b/doc/conf.py
index 202335f6..d3bc05ea 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 #
 # Python Performance Benchmark Suite documentation build configuration file, created by
 # sphinx-quickstart on Tue Mar 28 15:59:41 2017.
diff --git a/examples/benchmarking-scripts/backfill.py b/examples/benchmarking-scripts/backfill.py
index 313ca479..5b873fdd 100644
--- a/examples/benchmarking-scripts/backfill.py
+++ b/examples/benchmarking-scripts/backfill.py
@@ -16,7 +16,7 @@
 
 def get_revisions() -> tuple[str, str]:
     revisions = []
-    with open("backfill_shas.txt", "r") as f:
+    with open("backfill_shas.txt") as f:
         for line in f:
             sha, branch = line.split("=")
             revisions.append((sha, branch.rstrip()))
diff --git a/pyperformance/_pyproject_toml.py b/pyperformance/_pyproject_toml.py
index 40b26e82..17d4afd4 100644
--- a/pyperformance/_pyproject_toml.py
+++ b/pyperformance/_pyproject_toml.py
@@ -12,6 +12,7 @@
 
 import os.path
 import re
+import tomllib
 import urllib.parse
 
 import packaging.requirements
@@ -19,11 +20,6 @@
 import packaging.utils
 import packaging.version
 
-try:
-    import tomllib  # type: ignore[import-not-found] # tomllib doesn't exist on 3.7-3.10
-except ImportError:
-    import tomli as tomllib
-
 from ._utils import check_name
 
 NAME_RE = re.compile("^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$", re.IGNORECASE)
diff --git a/pyperformance/compare.py b/pyperformance/compare.py
index 176d797d..b9089796 100644
--- a/pyperformance/compare.py
+++ b/pyperformance/compare.py
@@ -231,7 +231,7 @@ def format_table(base_label, changed_label, results):
     return "\n".join(output)
 
 
-class BenchmarkResult(object):
+class BenchmarkResult:
     """An object representing data from a succesful benchmark run."""
 
     def __init__(self, base, changed):
diff --git a/pyperformance/compile.py b/pyperformance/compile.py
index c1ffe06d..447256fd 100644
--- a/pyperformance/compile.py
+++ b/pyperformance/compile.py
@@ -43,7 +43,7 @@ def replace_timezone(regs):
     return datetime.datetime.strptime(text2, "%Y-%m-%dT%H:%M:%S%z")
 
 
-class Task(object):
+class Task:
     def __init__(self, app, cwd):
         self.app = app
         self.cwd = cwd
@@ -118,14 +118,14 @@ def get_revision_info(self, revision):
             node, date = stdout.split("|")
             date = datetime.datetime.strptime(date, "%Y-%m-%d %H:%M:%S %z")
             # convert local date to UTC
-            date = (date - date.utcoffset()).replace(tzinfo=datetime.timezone.utc)
+            date = (date - date.utcoffset()).replace(tzinfo=datetime.UTC)
         else:
             node, date = stdout.split("|")
             date = datetime.datetime.strptime(date[:16], "%Y-%m-%d %H:%M")
         return (node, date)
 
 
-class Application(object):
+class Application:
     def __init__(self, conf, options):
         self.conf = conf
         self.options = options
diff --git a/pyperformance/data-files/benchmarks/bm_genshi/requirements.txt b/pyperformance/data-files/benchmarks/bm_genshi/requirements.txt
index 3ea4b594..333291bd 100644
--- a/pyperformance/data-files/benchmarks/bm_genshi/requirements.txt
+++ b/pyperformance/data-files/benchmarks/bm_genshi/requirements.txt
@@ -1,2 +1 @@
-genshi==0.7.7
-six==1.16.0
+genshi==0.7.12
diff --git a/pyperformance/data-files/benchmarks/bm_tornado_http/requirements.txt b/pyperformance/data-files/benchmarks/bm_tornado_http/requirements.txt
index 180ff786..f60a887b 100644
--- a/pyperformance/data-files/benchmarks/bm_tornado_http/requirements.txt
+++ b/pyperformance/data-files/benchmarks/bm_tornado_http/requirements.txt
@@ -1 +1 @@
-tornado==6.5.2
+tornado==6.6
diff --git a/pyperformance/tests/test_commands.py b/pyperformance/tests/test_commands.py
index 5b44f015..f3924692 100644
--- a/pyperformance/tests/test_commands.py
+++ b/pyperformance/tests/test_commands.py
@@ -456,7 +456,7 @@ def test_compare_csv(self):
         filename = self.resolve_tmp("outfile.csv", unique=True)
         with tests.CleanupFile(filename):
             self.compare("--csv", filename)
-            with open(filename, "r", encoding="utf-8") as infile:
+            with open(filename, encoding="utf-8") as infile:
                 csv = infile.read()
 
         self.assertEqual(csv, expected)
diff --git a/pyperformance/tests/test_venv.py b/pyperformance/tests/test_venv.py
index 3e0a6800..31912579 100644
--- a/pyperformance/tests/test_venv.py
+++ b/pyperformance/tests/test_venv.py
@@ -16,8 +16,6 @@ def new_venv_config(
     system_site_packages=False,
     executable=None,
     command=None,
-    *,
-    old=sys.version_info < (3, 11),
 ):
     if not home:
         home = os.path.dirname(sys.executable)
@@ -26,11 +24,10 @@ def new_venv_config(
     if not isinstance(system_site_packages, str):
         system_site_packages = "true" if system_site_packages else "false"
     system_site_packages = system_site_packages == "true"
-    if not old:
-        if executable is None:
-            executable = sys.executable
-        if command is None:
-            command = f"{executable} -m venv {root}"
+    if executable is None:
+        executable = sys.executable
+    if command is None:
+        command = f"{executable} -m venv {root}"
     return types.SimpleNamespace(
         home=home,
         version=version,
diff --git a/pyperformance/venv.py b/pyperformance/venv.py
index 6c7301a9..871790e8 100644
--- a/pyperformance/venv.py
+++ b/pyperformance/venv.py
@@ -12,7 +12,7 @@
 PYPERF_OPTIONAL = ["psutil"]
 
 
-class Requirements(object):
+class Requirements:
     @classmethod
     def from_file(cls, filename):
         self = cls()
diff --git a/pyproject.toml b/pyproject.toml
index 177d3c73..d1de8675 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ description = "Python benchmark suite"
 readme = "README.rst"
 license = { text = "MIT" }
 authors = [ { name = "Collin Winter" }, { name = "Jeffrey Yasskin" } ]
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",
@@ -55,21 +55,19 @@ classifiers = [
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3 :: Only",
-  "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",
+  "Programming Language :: Python :: 3.15",
 ]
 dynamic = [ "version" ]
 dependencies = [
   "packaging",
   "pyperf",
-  "tomli; python_version<'3.11'",
 ]
 optional-dependencies.dev = [
   "mypy==2.3.1",
-  "tomli",       # Needed even on 3.11+ for typechecking with mypy
   "tox",
 ]
 urls = { Homepage = "https://github.com/python/pyperformance" }
@@ -81,7 +79,7 @@ dynamic.version = { attr = "pyperformance.__version__" }
 packages.find = {}  # Scanning implicit namespaces is active by default
 
 [tool.ruff]
-target-version = "py310"
+target-version = "py311"
 exclude = [
   "pyperformance/data-files/",
 ]
@@ -99,10 +97,10 @@ lint.ignore = [
 ]
 
 [tool.pyproject-fmt]
-max_supported_python = "3.14"
+max_supported_python = "3.15"
 
 [tool.mypy]
-python_version = "3.10"
+python_version = "3.11"
 pretty = true
 enable_error_code = "ignore-without-code"
 disallow_any_generics = true
diff --git a/requirements.in b/requirements.in
index 55f432ef..04abf276 100644
--- a/requirements.in
+++ b/requirements.in
@@ -13,7 +13,6 @@ pyperf
 
 # for benchmark metadata:
 packaging
-tomli; python_version < '3.11'
 
 
 # Optional dependencies
diff --git a/tox.ini b/tox.ini
index 12ab9b65..96836941 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,5 +32,4 @@ ignore = E501,E741,W503
 basepython = python3
 deps=
     mypy
-    tomli
 commands = mypy