diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8fac4e4d33..276b844ec0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -2,9 +2,9 @@ name: Python tests
 
 on:
   push:
-    branches: [ master ]
+    branches: [ 0.6.x ]
   pull_request:
-    branches: [ master ]
+    branches: [ 0.6.x ]
 
 env:
   OMP_NUM_THREADS: 2
@@ -15,10 +15,10 @@ jobs:
     name: Run tests on ${{ matrix.os }} with Python ${{ matrix.python }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macOS-latest]
-        python: ['3.9']
-        torch: ['1.10.0']
-        torchvision: ['0.11.1']
+        os: [ubuntu-latest]
+        python: ['3.10']
+        torch: ['1.13.1']
+        torchvision: ['0.14.1']
     runs-on: ${{ matrix.os }}
 
     steps:
diff --git a/README.md b/README.md
index e5094e7300..a0f8926183 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@ And a big thanks to all GitHub sponsors who helped with some of my costs before
 
 ## What's New
 
+### March 23, 2022
+* 0.6.13 release to include Python 3.11 fix. Please try 0.8.x pre-releases (main branch or `pip install --pre timm`) for latest (transitioning to a 0.9 release soon).
+
 ### Oct 10, 2022
 * More weights in `maxxvit` series, incl first ConvNeXt block based `coatnext` and `maxxvit` experiments:
   * `coatnext_nano_rw_224` - 82.0 @ 224 (G) -- (uses ConvNeXt conv block, no BatchNorm)
diff --git a/setup.py b/setup.py
index 59b4ed4cfe..277636150f 100644
--- a/setup.py
+++ b/setup.py
@@ -29,11 +29,11 @@
         'Intended Audience :: Education',
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Scientific/Engineering',
         'Topic :: Scientific/Engineering :: Artificial Intelligence',
         'Topic :: Software Development',
@@ -46,6 +46,6 @@
     packages=find_packages(exclude=['convert', 'tests', 'results']),
     include_package_data=True,
     install_requires=['torch >= 1.7', 'torchvision', 'pyyaml', 'huggingface_hub'],
-    python_requires='>=3.6',
+    python_requires='>=3.7',
 )
 
diff --git a/timm/models/maxxvit.py b/timm/models/maxxvit.py
index bd52924548..4312d3d38b 100644
--- a/timm/models/maxxvit.py
+++ b/timm/models/maxxvit.py
@@ -39,7 +39,7 @@
 
 import math
 from collections import OrderedDict
-from dataclasses import dataclass, replace
+from dataclasses import dataclass, replace, field
 from functools import partial
 from typing import Callable, Optional, Union, Tuple, List
 
@@ -229,8 +229,8 @@ class MaxxVitCfg:
     block_type: Tuple[Union[str, Tuple[str, ...]], ...] = ('C', 'C', 'T', 'T')
     stem_width: Union[int, Tuple[int, int]] = 64
     stem_bias: bool = True
-    conv_cfg: MaxxVitConvCfg = MaxxVitConvCfg()
-    transformer_cfg: MaxxVitTransformerCfg = MaxxVitTransformerCfg()
+    conv_cfg: MaxxVitConvCfg = field(default_factory=MaxxVitConvCfg)
+    transformer_cfg: MaxxVitTransformerCfg = field(default_factory=MaxxVitTransformerCfg)
     weight_init: str = 'vit_eff'
 
 
@@ -1910,4 +1910,5 @@ def maxvit_large_224(pretrained=False, **kwargs):
 
 @register_model
 def maxvit_xlarge_224(pretrained=False, **kwargs):
-    return _create_maxxvit('maxvit_xlarge_224', pretrained=pretrained, **kwargs)
\ No newline at end of file
+    return _create_maxxvit('maxvit_xlarge_224', pretrained=pretrained, **kwargs)
+
diff --git a/timm/version.py b/timm/version.py
index adfda343f1..70039a4cbb 100644
--- a/timm/version.py
+++ b/timm/version.py
@@ -1 +1 @@
-__version__ = '0.6.12'
+__version__ = '0.6.13'