diff --git a/.github/workflows/registry-updates.yaml b/.github/workflows/registry-updates.yaml
index dca9ffdb..b48b14f9 100644
--- a/.github/workflows/registry-updates.yaml
+++ b/.github/workflows/registry-updates.yaml
@@ -37,7 +37,7 @@ jobs:
           ADDED_FILES: ${{ steps.changed-files.outputs.added_files }}
           MODIFIED_FILES: ${{ steps.changed-files.outputs.modified_files }}
           DELETED_FILES: ${{ steps.changed-files.outputs.deleted_files }}
-          OUTPUT: ${{ fromJSON(steps.changed-files.outputs) }}
+          OUTPUT: ${{ string(steps.changed-files.outputs) }}
         run: |
           echo $OUTPUT > changed_files.txt