diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index c5144cb72..27c611579 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -85,7 +85,7 @@ jobs:
           cmd_options: "-I"
 
   a11y-scan:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup-project