diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d08f9fb..e22c0f4 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -10,12 +10,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.13'
+          cache: pip
 
       - name: Install ruff
         run: |
diff --git a/.github/workflows/specs.yml b/.github/workflows/specs.yml
index ca3b64c..cd07851 100644
--- a/.github/workflows/specs.yml
+++ b/.github/workflows/specs.yml
@@ -12,15 +12,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
+          cache: pip
 
       - name: Install dependencies
         run: |
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7abafa7..9d24834 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,14 @@
 master
 ------
 
+7.3.0 (2026-09-07)
+------------------
+
+-  add ``PaymentRequiredError`` for HTTP 402 responses
+-  raise the ``requests`` minimum to ``2.32.5``
+-  pin ``ruff`` to ``0.15.22``
+-  test on Python 3.9–3.14
+
 7.2.0 (2026-06-09)
 ------------------
 
diff --git a/DEVELOPMENT.rst b/DEVELOPMENT.rst
index f138658..fa2e9b2 100644
--- a/DEVELOPMENT.rst
+++ b/DEVELOPMENT.rst
@@ -24,7 +24,7 @@ Test
 
     $ make test
 
-Runs ``python3 -m unittest -v castle.test``. CI runs the same suite on Python 3.9–3.13 via GitHub Actions (``.github/workflows/specs.yml``).
+Runs ``python3 -m unittest -v castle.test``. CI runs the same suite on Python 3.9–3.14 via GitHub Actions (``.github/workflows/specs.yml``).
 
 Linting
 -------
diff --git a/README.rst b/README.rst
index b6bbdd0..a45dc00 100644
--- a/README.rst
+++ b/README.rst
@@ -190,6 +190,7 @@ All exceptions inherit from ``CastleError``. The most useful ones:
 - ``InvalidRequestTokenError`` — the request token is missing or invalid
 - ``InvalidParametersError`` — 422 response with validation details
 - ``RateLimitError`` — 429 response; back off and retry
+- ``PaymentRequiredError`` — 402 response
 - ``UnauthorizedError`` — 401; bad API secret
 - ``InternalServerError`` — 5xx response from Castle
 - ``WebhookVerificationError`` — webhook signature did not match
diff --git a/castle/core/process_response.py b/castle/core/process_response.py
index e8d7669..93e216d 100644
--- a/castle/core/process_response.py
+++ b/castle/core/process_response.py
@@ -10,12 +10,14 @@
     InternalServerError,
     InvalidRequestTokenError,
     RateLimitError,
+    PaymentRequiredError,
 )
 from castle.logger import Logger
 
 RESPONSE_ERRORS = {
     400: BadRequestError,
     401: UnauthorizedError,
+    402: PaymentRequiredError,
     403: ForbiddenError,
     404: NotFoundError,
     419: UserUnauthorizedError,
diff --git a/castle/errors.py b/castle/errors.py
index 5911ea5..d2fc39a 100644
--- a/castle/errors.py
+++ b/castle/errors.py
@@ -55,5 +55,9 @@ class RateLimitError(APIError):
     pass
 
 
+class PaymentRequiredError(APIError):
+    pass
+
+
 class InternalServerError(APIError):
     pass
diff --git a/castle/test/core/process_response_test.py b/castle/test/core/process_response_test.py
index 87f0dce..6974d02 100644
--- a/castle/test/core/process_response_test.py
+++ b/castle/test/core/process_response_test.py
@@ -13,6 +13,7 @@
     InternalServerError,
     InvalidRequestTokenError,
     RateLimitError,
+    PaymentRequiredError,
 )
 
 
@@ -91,6 +92,10 @@ def test_verify_419(self):
         with self.assertRaises(UserUnauthorizedError):
             CoreProcessResponse(response(status_code=419)).verify()
 
+    def test_verify_402(self):
+        with self.assertRaises(PaymentRequiredError):
+            CoreProcessResponse(response(status_code=402)).verify()
+
     def test_verify_429(self):
         with self.assertRaises(RateLimitError):
             CoreProcessResponse(response(status_code=429)).verify()
diff --git a/castle/version.py b/castle/version.py
index 52dac8d..8d0dc2c 100644
--- a/castle/version.py
+++ b/castle/version.py
@@ -1 +1 @@
-VERSION = '7.2.0'
+VERSION = '7.3.0'
diff --git a/pyproject.toml b/pyproject.toml
index 82867e1..266fd2c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ authors = [
 requires-python = ">=3.9"
 dynamic = ["version"]
 dependencies = [
-    "requests>=2.31",
+    "requests>=2.32.5",
 ]
 classifiers = [
     "Environment :: Web Environment",
@@ -27,6 +27,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
 ]
 
 [project.urls]
@@ -36,7 +37,7 @@ Changelog = "https://github.com/castle/castle-python/blob/master/CHANGELOG.rst"
 
 [project.optional-dependencies]
 test = ["responses>=0.23"]
-lint = ["ruff>=0.6"]
+lint = ["ruff==0.15.22"]
 
 [tool.setuptools.dynamic]
 version = { attr = "castle.version.VERSION" }