diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 222bfe3..61da044 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/setup.cfg b/setup.cfg
index 0df7ca4..85d0a5e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -45,6 +45,7 @@ install_requires =
     argparse
     argcomplete
     importlib_resources
+    typing_extensions; python_version<='3.8'
 setup_requires = setuptools_scm
 tests_require =
     jaconv