diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index dd7705b1..42363921 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/README.md b/README.md
index d1f30a92..e7ba576a 100644
--- a/README.md
+++ b/README.md
@@ -142,7 +142,7 @@ Use pip to install:
 $ pip install mashumaro
 ```
 
-The current version of `mashumaro` supports Python versions 3.8 — 3.12.
+The current version of `mashumaro` supports Python versions 3.8 — 3.13.
 
 
 It's not recommended to use any version of Python that has reached its
diff --git a/mashumaro/core/const.py b/mashumaro/core/const.py
index 3e3262d1..20d8d438 100644
--- a/mashumaro/core/const.py
+++ b/mashumaro/core/const.py
@@ -9,6 +9,7 @@
     "PY_310_MIN",
     "PY_311_MIN",
     "PY_312_MIN",
+    "PY_313_MIN",
     "PEP_585_COMPATIBLE",
     "Sentinel",
 ]
@@ -18,8 +19,10 @@
 PY_39 = sys.version_info.major == 3 and sys.version_info.minor == 9
 PY_310 = sys.version_info.major == 3 and sys.version_info.minor == 10
 PY_311 = sys.version_info.major == 3 and sys.version_info.minor == 11
-PY_312_MIN = sys.version_info.major == 3 and sys.version_info.minor >= 12
+PY_312 = sys.version_info.major == 3 and sys.version_info.minor == 12
+PY_313_MIN = sys.version_info.major == 3 and sys.version_info.minor >= 13
 
+PY_312_MIN = PY_312 or PY_313_MIN
 PY_311_MIN = PY_311 or PY_312_MIN
 PY_310_MIN = PY_310 or PY_311_MIN
 PY_39_MIN = PY_39 or PY_310_MIN
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 449cd946..2d8c736e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,7 @@ msgpack>=0.5.6
 pyyaml>=3.13
 tomli-w>=1.0
 tomli>=1.1.0;python_version<'3.11'
-orjson>=3.6.1
+orjson>=3.6.1;python_version<'3.13'
 
 # tests
 mypy>=0.812
@@ -18,7 +18,7 @@ codespell>=2.2.2
 
 # third party features
 ciso8601>=2.1.3
-pendulum>=2.1.2
+pendulum>=2.1.2;python_version<'3.13'
 
 # benchmark
 pyperf>=2.6.1
diff --git a/setup.py b/setup.py
index 829fcd67..d7b76b94 100644
--- a/setup.py
+++ b/setup.py
@@ -18,6 +18,7 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Development Status :: 5 - Production/Stable",
     ],
     license="Apache License, Version 2.0",
diff --git a/tests/conftest.py b/tests/conftest.py
index 9e2c07f7..26f3cf7d 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,5 +1,16 @@
 from unittest.mock import patch
 
+from mashumaro.core.const import PY_313_MIN
+
+if PY_313_MIN:
+    collect_ignore = [
+        "test_codecs/test_orjson_codec.py",
+        "test_discriminated_unions/test_dialects.py",
+        "test_orjson.py",
+        "test_pep_563.py",
+        "test_self.py",
+    ]
+
 add_unpack_method = patch(
     "mashumaro.core.meta.code.builder.CodeBuilder.add_unpack_method",
     lambda *args, **kwargs: ...,
diff --git a/tests/test_common.py b/tests/test_common.py
index 5f0c5076..c628ef62 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -190,9 +190,8 @@ def __init__(self, number):
         instance = cls(1)
         with pytest.raises(AttributeError) as e:
             instance.new_attribute = 2
-        assert (
-            str(e.value)
-            == f"'{cls.__name__}' object has no attribute 'new_attribute'"
+        assert str(e.value).startswith(
+            f"'{cls.__name__}' object has no attribute 'new_attribute'"
         )
 
 
diff --git a/tests/test_metadata_options.py b/tests/test_metadata_options.py
index a2d891f0..29899c9e 100644
--- a/tests/test_metadata_options.py
+++ b/tests/test_metadata_options.py
@@ -7,7 +7,7 @@
 import pytest
 
 from mashumaro import DataClassDictMixin
-from mashumaro.core.const import PY_312_MIN
+from mashumaro.core.const import PY_312_MIN, PY_313_MIN
 from mashumaro.exceptions import (
     UnserializableField,
     UnsupportedDeserializationEngine,
@@ -58,6 +58,7 @@ class DataClass(DataClassDictMixin):
     assert instance == should_be
 
 
+@pytest.mark.skipif(PY_313_MIN, reason="pendulum doesn't install on 3.13")
 def test_pendulum_datetime_parser():
     @dataclass
     class DataClass(DataClassDictMixin):
@@ -68,6 +69,7 @@ class DataClass(DataClassDictMixin):
     assert instance == should_be
 
 
+@pytest.mark.skipif(PY_313_MIN, reason="pendulum doesn't install on 3.13")
 def test_pendulum_date_parser():
     @dataclass
     class DataClass(DataClassDictMixin):
@@ -78,6 +80,7 @@ class DataClass(DataClassDictMixin):
     assert instance == should_be
 
 
+@pytest.mark.skipif(PY_313_MIN, reason="pendulum doesn't install on 3.13")
 def test_pendulum_time_parser():
     @dataclass
     class DataClass(DataClassDictMixin):