diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9c08f5a..ae9fe56 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -47,10 +47,14 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
         include:
           - os: macos-latest
             python-version: '3.8'
+          - os: 'ubuntu-20.04'
+            python-version: '3.6'
+          - os: 'ubuntu-20.04'
+            python-version: '3.7'
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -63,12 +67,12 @@ jobs:
         run: |
           python3 -m pip install .[test]
       - name: Install Just on macOS
-        if: ${{ matrix.os == 'macos-latest' }}
+        if: ${{ startsWith(matrix.os, 'macos') }}
         run: |
           curl -L "https://github.com/casey/just/releases/download/${JUST_VERSION}/just-${JUST_VERSION}-x86_64-apple-darwin.tar.gz" \
             | sudo tar -C /usr/local/bin -xzv just
       - name: Install Just on Linux
-        if: ${{ matrix.os == 'ubuntu-latest' }}
+        if: ${{ startsWith(matrix.os, 'ubuntu') }}
         run: |
           curl -L "https://github.com/casey/just/releases/download/${JUST_VERSION}/just-${JUST_VERSION}-x86_64-unknown-linux-musl.tar.gz" \
             | sudo tar -C /usr/local/bin -xzv just
diff --git a/just_sh/parse.py b/just_sh/parse.py
index 868256a..2b43383 100644
--- a/just_sh/parse.py
+++ b/just_sh/parse.py
@@ -5,7 +5,7 @@
 import re
 import sys
 from dataclasses import dataclass
-from typing import Any, Callable, List, Optional, TextIO, Tuple, Union, cast
+from typing import Any, Callable, List, Optional, TextIO, Tuple, Type, Union, cast
 
 from parsy import (
     Parser,
@@ -520,7 +520,7 @@ def _body() -> Parser:
     return cast(List[Item], justfile_parser.parse(preprocess(data)))
 
 
-def run(f: TextIO, encoder: type[json.JSONEncoder], verbose: bool = False) -> None:
+def run(f: TextIO, encoder: Type[json.JSONEncoder], verbose: bool = False) -> None:
     print(json.dumps(parse(f.read(), verbose=verbose), cls=encoder, indent=2))
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 63de135..ae36954 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@
 ########################################################################################
 
 [build-system]
-requires = ["setuptools >= 61.0", "setuptools_scm >= 8"]
+requires = ["setuptools >= 59.6.0", "setuptools_scm >= 6.4.2"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools.package-dir]
@@ -37,7 +37,6 @@ classifiers = [
     "Intended Audience :: Developers",
     "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
     "Operating System :: OS Independent",
-    # "Programming Language :: Unix Shell",
     "Programming Language :: Python :: 3",
     "Topic :: Software Development",
     "Topic :: Software Development :: Code Generators",