diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a45d1810..78b03cce 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,11 +20,11 @@ jobs:
     outputs:
       noxenvs: ${{ steps.noxenvs-matrix.outputs.noxenvs }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
       - name: Set up uv
-        uses: astral-sh/setup-uv@bd01e18f51369d5a26f1651c3cb451d3417e3bba
+        uses: astral-sh/setup-uv@557e51de59eb14aaaba2ed9621916900a91d50c6
         with:
           enable-cache: ${{ github.ref_type != 'tag' }} # zizmor: ignore[cache-poisoning]
       - id: noxenvs-matrix
@@ -75,7 +75,7 @@ jobs:
             noxenv: "docs(style)"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
       - name: Install dependencies
@@ -85,7 +85,7 @@ jobs:
         run: brew install enchant
         if: runner.os == 'macOS' && startsWith(matrix.noxenv, 'docs')
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: |
             3.9
@@ -100,7 +100,7 @@ jobs:
         if: runner.os == 'Windows' && startsWith(matrix.noxenv, 'tests')
 
       - name: Set up uv
-        uses: astral-sh/setup-uv@bd01e18f51369d5a26f1651c3cb451d3417e3bba
+        uses: astral-sh/setup-uv@557e51de59eb14aaaba2ed9621916900a91d50c6
         with:
           enable-cache: true
 
@@ -119,12 +119,12 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
           persist-credentials: false
       - name: Set up uv
-        uses: astral-sh/setup-uv@bd01e18f51369d5a26f1651c3cb451d3417e3bba
+        uses: astral-sh/setup-uv@557e51de59eb14aaaba2ed9621916900a91d50c6
         with:
           enable-cache: true
 
@@ -133,10 +133,10 @@ jobs:
 
       - name: Publish to PyPI
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        uses: pypa/gh-action-pypi-publish@76f52bc884231f62b9a034ebfe128415bbaabdfc
+        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e
       - name: Create a GitHub Release
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        uses: softprops/action-gh-release@72f2c25fcb47643c292f7107632f7a47c1df5cd8
+        uses: softprops/action-gh-release@6cbd405e2c4e67a21c47fa9e383d020e4e28b836
         with:
           files: |
             dist/*
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index 17f2bd11..121c14c1 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -15,12 +15,12 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           persist-credentials: false
 
       - name: Install uv
-        uses: astral-sh/setup-uv@bd01e18f51369d5a26f1651c3cb451d3417e3bba
+        uses: astral-sh/setup-uv@557e51de59eb14aaaba2ed9621916900a91d50c6
 
       - name: Run zizmor 🌈
         run: uvx zizmor --format=sarif .github > results.sarif
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 77b36341..5eae75bc 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@ exclude: json/
 
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
       - id: check-ast
       - id: check-json
@@ -16,7 +16,7 @@ repos:
         args: [--fix, lf]
       - id: trailing-whitespace
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.12.3"
+    rev: "v0.12.12"
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ed0fa3b6..836fdcdc 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,14 @@
+v4.25.1
+=======
+
+* Fix an incorrect required argument in the ``Validator`` protocol's type annotations (#1396).
+
+v4.25.0
+=======
+
+* Add support for the ``iri`` and ``iri-reference`` formats to the ``format-nongpl`` extra via the MIT-licensed ``rfc3987-syntax``.
+  They were alread supported by the ``format`` extra. (#1388).
+
 v4.24.1
 =======
 
diff --git a/docs/validate.rst b/docs/validate.rst
index 91f0577b..bc740e34 100644
--- a/docs/validate.rst
+++ b/docs/validate.rst
@@ -206,8 +206,6 @@ Or if you want to avoid GPL dependencies, a second extra is available:
 
     $ pip install jsonschema[format-nongpl]
 
-At the moment, it supports all the available checkers except for ``iri`` and ``iri-reference``.
-
 .. warning::
 
     It is your own responsibility ultimately to ensure you are license-compliant, so you should be double checking your own dependencies if you rely on this extra.
@@ -230,8 +228,8 @@ Checker                    Notes
 ``idn-hostname``           requires idna_
 ``ipv4``
 ``ipv6``                   OS must have `socket.inet_pton` function
-``iri``                    requires rfc3987_
-``iri-reference``          requires rfc3987_
+``iri``                    requires rfc3987_ or rfc3987-syntax_
+``iri-reference``          requires rfc3987_ or rfc3987-syntax_
 ``json-pointer``           requires jsonpointer_
 ``regex``
 ``relative-json-pointer``  requires jsonpointer_
@@ -249,6 +247,7 @@ Checker                    Notes
 .. _rfc3339-validator: https://pypi.org/project/rfc3339-validator/
 .. _rfc3986-validator: https://pypi.org/project/rfc3986-validator/
 .. _rfc3987: https://pypi.org/pypi/rfc3987/
+.. _rfc3987-syntax: https://pypi.org/pypi/rfc3987-syntax/
 .. _uri-template: https://pypi.org/pypi/uri-template/
 .. _webcolors: https://pypi.org/pypi/webcolors/
 
diff --git a/jsonschema/_format.py b/jsonschema/_format.py
index 9b4e67b6..6fc7a01e 100644
--- a/jsonschema/_format.py
+++ b/jsonschema/_format.py
@@ -324,6 +324,31 @@ def is_uri_reference(instance: object) -> bool:
                 return True
             return validate_rfc3986(instance, rule="URI_reference")
 
+    with suppress(ImportError):
+        from rfc3987_syntax import is_valid_syntax as _rfc3987_is_valid_syntax
+
+        @_checks_drafts(
+            draft7="iri",
+            draft201909="iri",
+            draft202012="iri",
+            raises=ValueError,
+        )
+        def is_iri(instance: object) -> bool:
+            if not isinstance(instance, str):
+                return True
+            return _rfc3987_is_valid_syntax("iri", instance)
+
+        @_checks_drafts(
+            draft7="iri-reference",
+            draft201909="iri-reference",
+            draft202012="iri-reference",
+            raises=ValueError,
+        )
+        def is_iri_reference(instance: object) -> bool:
+            if not isinstance(instance, str):
+                return True
+            return _rfc3987_is_valid_syntax("iri_reference", instance)
+
 else:
 
     @_checks_drafts(
diff --git a/jsonschema/protocols.py b/jsonschema/protocols.py
index 0fd993ee..b6288dcc 100644
--- a/jsonschema/protocols.py
+++ b/jsonschema/protocols.py
@@ -108,10 +108,11 @@ class Validator(Protocol):
     def __init__(
         self,
         schema: Mapping | bool,
-        registry: referencing.jsonschema.SchemaRegistry,
+        resolver: Any = None,  # deprecated
         format_checker: jsonschema.FormatChecker | None = None,
-    ) -> None:
-        ...
+        *,
+        registry: referencing.jsonschema.SchemaRegistry = ...,
+    ) -> None: ...
 
     @classmethod
     def check_schema(cls, schema: Mapping | bool) -> None:
diff --git a/jsonschema/tests/typing/__init__.py b/jsonschema/tests/typing/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/jsonschema/tests/typing/test_all_concrete_validators_match_protocol.py b/jsonschema/tests/typing/test_all_concrete_validators_match_protocol.py
new file mode 100644
index 00000000..63e8bd40
--- /dev/null
+++ b/jsonschema/tests/typing/test_all_concrete_validators_match_protocol.py
@@ -0,0 +1,38 @@
+"""
+This module acts as a test that type checkers will allow each validator
+class to be assigned to a variable of type `type[Validator]`
+
+The assignation is only valid if type checkers recognize each Validator
+implementation as a valid implementer of the protocol.
+"""
+from jsonschema.protocols import Validator
+from jsonschema.validators import (
+    Draft3Validator,
+    Draft4Validator,
+    Draft6Validator,
+    Draft7Validator,
+    Draft201909Validator,
+    Draft202012Validator,
+)
+
+my_validator: type[Validator]
+
+my_validator = Draft3Validator
+my_validator = Draft4Validator
+my_validator = Draft6Validator
+my_validator = Draft7Validator
+my_validator = Draft201909Validator
+my_validator = Draft202012Validator
+
+
+# in order to confirm that none of the above were incorrectly typed as 'Any'
+# ensure that each of these assignments to a non-validator variable requires an
+# ignore
+none_var: None
+
+none_var = Draft3Validator  # type: ignore[assignment]
+none_var = Draft4Validator  # type: ignore[assignment]
+none_var = Draft6Validator  # type: ignore[assignment]
+none_var = Draft7Validator  # type: ignore[assignment]
+none_var = Draft201909Validator  # type: ignore[assignment]
+none_var = Draft202012Validator  # type: ignore[assignment]
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index b8ca3bd4..dbc029fc 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -147,7 +147,7 @@ def create(
     applicable_validators: _typing.ApplicableValidators = methodcaller(
         "items",
     ),
-):
+) -> type[Validator]:
     """
     Create a new validator class.
 
@@ -511,7 +511,7 @@ def is_valid(self, instance, _schema=None):
         Validator.__name__ = Validator.__qualname__ = f"{safe}Validator"
         Validator = validates(version)(Validator)  # type: ignore[misc]
 
-    return Validator
+    return Validator  # type: ignore[return-value]
 
 
 def extend(
diff --git a/noxfile.py b/noxfile.py
index 3a306c38..05a23845 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -6,6 +6,7 @@
 
 ROOT = Path(__file__).parent
 PACKAGE = ROOT / "jsonschema"
+TYPING_TESTS= ROOT / "jsonschema" / "tests" / "typing"
 BENCHMARKS = PACKAGE / "benchmarks"
 PYPROJECT = ROOT / "pyproject.toml"
 CHANGELOG = ROOT / "CHANGELOG.rst"
@@ -128,6 +129,7 @@ def license_check(session):
         "jsonschema",
         "jsonschema-specifications",
         "referencing",
+        "rpds-py",
         "types-python-dateutil",
 
         "--allow-only",
@@ -180,6 +182,9 @@ def typing(session):
     """
     session.install("mypy", "types-requests", ROOT)
     session.run("mypy", "--config", PYPROJECT, PACKAGE)
+    session.run(
+        "mypy", "--config", PYPROJECT, "--warn-unused-ignores", TYPING_TESTS,
+    )
 
 
 @session(tags=["docs"])
diff --git a/pyproject.toml b/pyproject.toml
index e2c128cc..ad98e9f5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,6 +62,7 @@ format-nongpl = [
   "jsonpointer>1.13",
   "rfc3339-validator",
   "rfc3986-validator>0.1.0",
+  "rfc3987-syntax>=1.1.0",
   "uri_template",
   "webcolors>=24.6.0",
 ]