diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e4cbe736dfd..2dd1899fb61 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12.4", "3.13", "pypy-3.9"]
+        python-version: ["3.9", "3.10", "3.11", "3.12.4", "3.13", "3.14", "pypy-3.9"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:
diff --git a/CHANGES.md b/CHANGES.md
index cb71e3f4ec4..2d7f8684ca8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,6 +9,8 @@
 
 <!-- Include any especially major or disruptive changes here -->
 
+- Enable base 3.14 support (#4804)
+
 ### Stable style
 
 <!-- Changes that affect Black's stable style -->
@@ -59,6 +61,7 @@
 
 <!-- For example, Docker, GitHub Actions, pre-commit, editors -->
 
+- Enable 3.14 base CI (#4804)
 - Enhance GitHub Action `psf/black` to support the `required-version` major-version-only
   "stability" format when using pyproject.toml (#4770)
 - Improve error message for vim plugin users. It now handles independently vim version
diff --git a/pyproject.toml b/pyproject.toml
index 11886e4a3c7..ed787d2422f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,6 +60,7 @@ classifiers = [
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
   "Topic :: Software Development :: Libraries :: Python Modules",
   "Topic :: Software Development :: Quality Assurance",
 ]
diff --git a/tox.ini b/tox.ini
index d4450219dc0..12493c42686 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 isolated_build = true
-envlist = {,ci-}py{39,310,311,312,313,py3},fuzz,run_self,generate_schema
+envlist = {,ci-}py{39,310,311,312,313,314,py3},fuzz,run_self,generate_schema
 
 [testenv]
 setenv =