diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f95b238..a33dfef 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9", "pypy3.10"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "pypy3.10", "pypy3.11"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python
diff --git a/README.rst b/README.rst
index 30b499f..dfbc721 100644
--- a/README.rst
+++ b/README.rst
@@ -16,7 +16,7 @@ Python application.
 Requirements
 ------------
 
--  Python 3.7+
+-  Python 3.10+
 - ``msgpack``
 - **IMPORTANT**: Version 0.8.0 is the last version supporting Python 2.6, 3.2 and 3.3
 - **IMPORTANT**: Version 0.9.6 is the last version supporting Python 2.7 and 3.4
diff --git a/pyproject.toml b/pyproject.toml
index 8140e03..88eefff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ dynamic = ["version"]
 description = "A Python logging handler for Fluentd event collector"
 readme = "README.rst"
 license = { file = "COPYING" }
-requires-python = ">=3.7"
+requires-python = ">=3.10"
 authors = [
     { name = "Kazuki Ohta", email = "kazuki.ohta@gmail.com" },
 ]
@@ -20,12 +20,11 @@ classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
-    "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",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: System :: Logging",
diff --git a/tox.ini b/tox.ini
index 14634e9..74c7b2e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.7.2
-envlist = py27, py32, py33, py34, py35, py36, py37, py38
+envlist = py310, py311, py312, py313, py314
 skip_missing_interpreters = True
 
 [testenv]