diff --git a/.github/workflows/pre-pull-images.yaml b/.github/workflows/pre-pull-images.yaml
index 64fa300553..55f62edb81 100644
--- a/.github/workflows/pre-pull-images.yaml
+++ b/.github/workflows/pre-pull-images.yaml
@@ -70,8 +70,9 @@ jobs:
         id: compare-images
         shell: bash
         run: |
-          echo "${{ needs.extract-images.outputs }}"
-          images=$(jq 'to_entries as $entries | ($entries[0].value - $entries[1].value)' "${{ needs.extract-images.outputs }}")
+          images="${{ toJSON(needs.extract-images.outputs) }}"
+          echo "$images"
+          images=$(jq 'to_entries as $entries | ($entries[0].value - $entries[1].value)' "${images}")
           echo "images=${images}" >> $GITHUB_OUTPUT
 
   pre-pull-images: