diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7168992..6c40342 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -46,12 +46,12 @@ jobs:
       fail-fast: false
       matrix:
         python: [
-          "3.8",
-          "3.9",
           "3.10",
           "3.11",
           "3.12",
           "3.13",
+          "3.14",
+          "3.15",
         ]
 
     steps:
diff --git a/mypy_extensions.py b/mypy_extensions.py
index 1910000..891766b 100644
--- a/mypy_extensions.py
+++ b/mypy_extensions.py
@@ -45,6 +45,13 @@ def _typeddict_new(cls, _typename, _fields=None, **kwargs):
     return _TypedDictMeta(_typename, (), ns, _from_functional_call=True)
 
 
+def _get_own_annotations(tp):
+    if sys.version_info >= (3, 14):
+        import annotationlib
+        return annotationlib.get_annotations(tp)
+    return tp.__dict__.get('__annotations__', {})
+
+
 class _TypedDictMeta(type):
     def __new__(cls, name, bases, ns, total=True, _from_functional_call=False):
         # Create new typed dict class object.
@@ -71,11 +78,15 @@ def __new__(cls, name, bases, ns, total=True, _from_functional_call=False):
         ns['__new__'] = _typeddict_new if name == 'TypedDict' else _dict_new
         tp_dict = super(_TypedDictMeta, cls).__new__(cls, name, (dict,), ns)
 
-        anns = ns.get('__annotations__', {})
+        if '__annotations__' in ns:
+            anns = ns['__annotations__']
+        else:
+            # Python 3.14+ evaluates class annotations lazily (PEP 649)
+            anns = _get_own_annotations(tp_dict)
         msg = "TypedDict('Name', {f0: t0, f1: t1, ...}); each t must be a type"
         anns = {n: _type_check(tp, msg) for n, tp in anns.items()}
         for base in bases:
-            anns.update(base.__dict__.get('__annotations__', {}))
+            anns.update(_get_own_annotations(base))
         tp_dict.__annotations__ = anns
         if not hasattr(tp_dict, '__total__'):
             tp_dict.__total__ = total
diff --git a/pyproject.toml b/pyproject.toml
index 9cce176..4f3d56d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,15 +16,15 @@ classifiers = [
     "Environment :: Console",
     "Intended Audience :: Developers",
     "Programming Language :: Python :: 3",
-    "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 :: 3.15",
     "Topic :: Software Development",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 
 [project.urls]
 Homepage = "https://github.com/python/mypy_extensions"
diff --git a/tox.ini b/tox.ini
index 3412839..8a56f3b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 4.4.4
 skip_missing_interpreters = true
-envlist = py38, py39, py310, py311, py312, py313
+envlist = py310, py311, py312, py313, py314, py315
 
 [testenv]
 description = run the test driver with {basepython}