diff --git a/.github/workflows/package_lint-test.yml b/.github/workflows/package_lint-test.yml
index 2adb962..106b11e 100644
--- a/.github/workflows/package_lint-test.yml
+++ b/.github/workflows/package_lint-test.yml
@@ -12,11 +12,11 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04  # py36 is EOL on ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "pypy3.9"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "pypy3.9"]
 
     steps:
     - uses: actions/checkout@v3