diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6cca544f..7c563897 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,11 +28,8 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - centos-7
           - centos-stream-8
-          - ubuntu-1804
           - ubuntu-2004
-          - debian-9
           - debian-10
     runs-on: ubuntu-latest
     steps: