diff --git a/.github/workflows/cleanup-caches.yml b/.github/workflows/cleanup-caches.yml
index 4688a09d5..f38011eb5 100644
--- a/.github/workflows/cleanup-caches.yml
+++ b/.github/workflows/cleanup-caches.yml
@@ -21,5 +21,5 @@ jobs:
       - name: Cleanup
         uses: 4m-mazi/souji-action@test
         with:
-          branch-names: ${{ inputs.branchName }}
+          branch-names: ${{ fromjson(inputs.branchName) }}
           dry-run: true