diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index 1813323..bc42ce6 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -7,8 +7,8 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10"]
-        os: [ubuntu-18.04, macos-latest, windows-latest]
         poetry-version: ["1.4.0"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2