diff --git a/.azure-pipelines/templates/jobs/extended-tests-jobs.yml b/.azure-pipelines/templates/jobs/extended-tests-jobs.yml
index 5aa9fcb12..9ce2b1088 100644
--- a/.azure-pipelines/templates/jobs/extended-tests-jobs.yml
+++ b/.azure-pipelines/templates/jobs/extended-tests-jobs.yml
@@ -4,7 +4,7 @@ jobs:
       - name: IMAGE_NAME
         value: ubuntu-22.04
       - name: PYTHON_VERSION
-        value: 3.13
+        value: 3.14
       - group: certbot-common
     strategy:
       matrix:
@@ -14,6 +14,9 @@ jobs:
         linux-py312:
           PYTHON_VERSION: 3.12
           TOXENV: py312
+        linux-py312:
+          PYTHON_VERSION: 3.13
+          TOXENV: py313
         linux-isolated:
           TOXENV: 'isolated-acme,isolated-certbot,isolated-apache,isolated-cloudflare,isolated-digitalocean,isolated-dnsimple,isolated-dnsmadeeasy,isolated-gehirn,isolated-google,isolated-linode,isolated-luadns,isolated-nsone,isolated-ovh,isolated-rfc2136,isolated-route53,isolated-sakuracloud,isolated-nginx'
         linux-integration-certbot-oldest:
@@ -31,7 +34,10 @@ jobs:
         linux-py312-integration:
           PYTHON_VERSION: 3.12
           TOXENV: integration
-        # python 3.13 integration tests are not run here because they're run as
+        linux-py313-integration:
+          PYTHON_VERSION: 3.13
+          TOXENV: integration
+        # python 3.14 integration tests are not run here because they're run as
         # part of the standard test suite
         nginx-compat:
           TOXENV: nginx_compat
diff --git a/.azure-pipelines/templates/jobs/standard-tests-jobs.yml b/.azure-pipelines/templates/jobs/standard-tests-jobs.yml
index b26333dd7..0902f04cd 100644
--- a/.azure-pipelines/templates/jobs/standard-tests-jobs.yml
+++ b/.azure-pipelines/templates/jobs/standard-tests-jobs.yml
@@ -1,7 +1,7 @@
 jobs:
   - job: test
     variables:
-      PYTHON_VERSION: 3.13
+      PYTHON_VERSION: 3.14
     strategy:
       matrix:
         macos-cover:
diff --git a/acme/pyproject.toml b/acme/pyproject.toml
index be58bb516..8cea42102 100644
--- a/acme/pyproject.toml
+++ b/acme/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
 ]
diff --git a/certbot-apache/pyproject.toml b/certbot-apache/pyproject.toml
index 4dbcbdacc..b7e6ea821 100644
--- a/certbot-apache/pyproject.toml
+++ b/certbot-apache/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-ci/pyproject.toml b/certbot-ci/pyproject.toml
index b262aa3cf..ff4d04cea 100644
--- a/certbot-ci/pyproject.toml
+++ b/certbot-ci/pyproject.toml
@@ -20,6 +20,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
 ]
diff --git a/certbot-compatibility-test/pyproject.toml b/certbot-compatibility-test/pyproject.toml
index ae9faa2a9..fe21a27d6 100644
--- a/certbot-compatibility-test/pyproject.toml
+++ b/certbot-compatibility-test/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
 ]
diff --git a/certbot-dns-cloudflare/pyproject.toml b/certbot-dns-cloudflare/pyproject.toml
index e842c851f..59d3a72b8 100644
--- a/certbot-dns-cloudflare/pyproject.toml
+++ b/certbot-dns-cloudflare/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-digitalocean/pyproject.toml b/certbot-dns-digitalocean/pyproject.toml
index 3770bd742..adf97d33b 100644
--- a/certbot-dns-digitalocean/pyproject.toml
+++ b/certbot-dns-digitalocean/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-dnsimple/pyproject.toml b/certbot-dns-dnsimple/pyproject.toml
index 557ffa27c..5a6606f46 100644
--- a/certbot-dns-dnsimple/pyproject.toml
+++ b/certbot-dns-dnsimple/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-dnsmadeeasy/pyproject.toml b/certbot-dns-dnsmadeeasy/pyproject.toml
index 7176fb3b1..9e8deb81c 100644
--- a/certbot-dns-dnsmadeeasy/pyproject.toml
+++ b/certbot-dns-dnsmadeeasy/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-gehirn/pyproject.toml b/certbot-dns-gehirn/pyproject.toml
index 4cbd67199..7f263d79c 100644
--- a/certbot-dns-gehirn/pyproject.toml
+++ b/certbot-dns-gehirn/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-google/pyproject.toml b/certbot-dns-google/pyproject.toml
index cd0346218..37083fcdc 100644
--- a/certbot-dns-google/pyproject.toml
+++ b/certbot-dns-google/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-linode/pyproject.toml b/certbot-dns-linode/pyproject.toml
index f098b2173..50b8ae100 100644
--- a/certbot-dns-linode/pyproject.toml
+++ b/certbot-dns-linode/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-luadns/pyproject.toml b/certbot-dns-luadns/pyproject.toml
index 4d20cf8ee..7dd9a678c 100644
--- a/certbot-dns-luadns/pyproject.toml
+++ b/certbot-dns-luadns/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-nsone/pyproject.toml b/certbot-dns-nsone/pyproject.toml
index 9c5fc36a7..0a5022c43 100644
--- a/certbot-dns-nsone/pyproject.toml
+++ b/certbot-dns-nsone/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-ovh/pyproject.toml b/certbot-dns-ovh/pyproject.toml
index b98eaf715..78e327c68 100644
--- a/certbot-dns-ovh/pyproject.toml
+++ b/certbot-dns-ovh/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-rfc2136/pyproject.toml b/certbot-dns-rfc2136/pyproject.toml
index bf4716c3f..09f223cc7 100644
--- a/certbot-dns-rfc2136/pyproject.toml
+++ b/certbot-dns-rfc2136/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-route53/pyproject.toml b/certbot-dns-route53/pyproject.toml
index a6e1ad8b9..e4d27512c 100644
--- a/certbot-dns-route53/pyproject.toml
+++ b/certbot-dns-route53/pyproject.toml
@@ -28,6 +28,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-dns-sakuracloud/pyproject.toml b/certbot-dns-sakuracloud/pyproject.toml
index 36ea00fc5..73342a46b 100644
--- a/certbot-dns-sakuracloud/pyproject.toml
+++ b/certbot-dns-sakuracloud/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot-nginx/pyproject.toml b/certbot-nginx/pyproject.toml
index 2818e37f1..a5c3d79ff 100644
--- a/certbot-nginx/pyproject.toml
+++ b/certbot-nginx/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/certbot/pyproject.toml b/certbot/pyproject.toml
index 3e7946e97..e93d832d2 100644
--- a/certbot/pyproject.toml
+++ b/certbot/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
     "Topic :: System :: Installation/Setup",
diff --git a/letstest/pyproject.toml b/letstest/pyproject.toml
index bd1d016ed..f3b4eb8c1 100644
--- a/letstest/pyproject.toml
+++ b/letstest/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Security",
 ]
diff --git a/newsfragments/10477.added b/newsfragments/10477.added
new file mode 100644
index 000000000..9e9393248
--- /dev/null
+++ b/newsfragments/10477.added
@@ -0,0 +1 @@
+Support for Python 3.14 was added.
diff --git a/tox.ini b/tox.ini
index 7bf0d34b0..00366755b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -52,10 +52,10 @@ commands =
 commands =
     {[base]pytest} acme certbot certbot-dns-cloudflare certbot-dns-digitalocean certbot-dns-dnsimple certbot-dns-dnsmadeeasy certbot-dns-gehirn certbot-dns-google certbot-dns-linode certbot-dns-luadns certbot-dns-nsone certbot-dns-ovh certbot-dns-rfc2136 certbot-dns-route53 certbot-dns-sakuracloud certbot-nginx certbot-apache
 
-[testenv:py3{,10,11,12,13}]
+[testenv:py3{,10,11,12,13,14}]
 commands = {[testenv:py]commands}
 
-[testenv:py3.{10,11,12,13}]
+[testenv:py3.{10,11,12,13,14}]
 commands = {[testenv:py]commands}
 
 [testenv:oldest]