diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index ebaa06c..b519ac4 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         python: [3.7, 3.8, 3.9, '3.10', '3.11']
diff --git a/setup.py b/setup.py
index 37bd8c1..9b6b0cf 100644
--- a/setup.py
+++ b/setup.py
@@ -26,6 +26,7 @@
         "ruamel.yaml>=0.17.7",
         "six>=1.15.0",
         "urllib3>=1.26.2,<2",
+        "legacy-cgi>=2.6.2; python_version>='3.10'",
     ],
     classifiers=[
         "Programming Language :: Python :: 3",