diff --git a/.github/workflows/__cleanup.yml b/.github/workflows/__cleanup.yml
index 70b27cf0..76c88286 100644
--- a/.github/workflows/__cleanup.yml
+++ b/.github/workflows/__cleanup.yml
@@ -48,7 +48,7 @@ jobs:
       docker_hub_username: ${{ vars.DOCKER_HUB_USERNAME }}
       dry_run: ${{ github.event_name == 'workflow_dispatch' && inputs.dry_run }}
       gh_bot_name: ${{ vars.GH_BOT_NAME }}
-      max_deletions: ${{ inputs.max_deletions || 0 }}
+      max_deletions: ${{ fromJSON(format('{0}', inputs.max_deletions || 0)) }}
     secrets:
       DOCKER_HUB_ACCESS_TOKEN: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
       GH_BOT_TOKEN: ${{ secrets.GH_BOT_TOKEN }}