diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68aa8738..ab6c8163 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -110,7 +110,7 @@ jobs:
     strategy:
       matrix:
         # install/release on not bionic
-        os-name: [ ubuntu-latest, ubuntu-18.04, macOS-latest, windows-latest ]
+        os-name: [ ubuntu-latest, ubuntu-20.04, macOS-latest, windows-latest ]
         python-version: [ 3.9 ]
 
     needs: [ install-build ]