diff --git a/.github/workflows/catalog.yml b/.github/workflows/catalog.yml
index 4d64578..aed4b7b 100644
--- a/.github/workflows/catalog.yml
+++ b/.github/workflows/catalog.yml
@@ -7,10 +7,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - run: |
-          printf '['>catalog.json;c=;
+          echo "[" >catalog.json;c=;
           for f in *;do [ -f "$f" ]||continue;[ "${f:0:1}" = . ]&&continue;
-          printf '%s{"name":"%s","raw":"https://raw.githubusercontent.com/%s/%s/%s"}' "$c" "$f" "$GITHUB_REPOSITORY" "$GITHUB_REF_NAME" "$f">>catalog.json;
-          c=,;done;printf ']'>>catalog.json
+          echo "$c  {\"name\": \"$f\", \"raw\": \"https://raw.githubusercontent.com/$GITHUB_REPOSITORY/$GITHUB_REF_NAME/$f\"}" >>catalog.json;
+          c=,;done
+          echo "]" >>catalog.json
           git config user.name bot
           git config user.email bot@users.noreply.github.com
           git add catalog.json