diff --git a/.github/workflows/R-CMD-check-asan.yaml b/.github/workflows/R-CMD-check-asan.yaml
index 6d6335b..737ff6b 100644
--- a/.github/workflows/R-CMD-check-asan.yaml
+++ b/.github/workflows/R-CMD-check-asan.yaml
@@ -35,13 +35,13 @@ jobs:
       - uses: r-hub/actions/platform-info@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          job-config: ${{ matrix.config }}
+          job-config: ${{ toJson(matrix.config) }}
       - uses: r-hub/actions/setup-deps@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          job-config: ${{ matrix.config }}
+          job-config: ${{ toJson(matrix.config) }}
       - uses: r-hub/actions/run-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          job-config: ${{ matrix.config }}
+          job-config: ${{ toJson(matrix.config) }}