diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c0f4ca0b1..43f855daa 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
     env:
       # we don't analyze pull requests, so the cached overlay base databases are never restored
-      CODEQL_OVERLAY_DATABASE_MODE: None
+      CODEQL_OVERLAY_DATABASE_MODE: none
     permissions:
       # required for all workflows
       security-events: write