diff --git a/.github/workflows/check-standard.yml b/.github/workflows/check-standard.yml
index eb57301..946d139 100644
--- a/.github/workflows/check-standard.yml
+++ b/.github/workflows/check-standard.yml
@@ -20,7 +20,7 @@ jobs:
           - {os: windows-latest, r: 'release'}
           - {os: ubuntu-latest,  r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,  r: 'oldrel-1'}
-        elasticsearch-version: 8
+        elasticsearch-version: [8]
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}