diff --git a/.github/workflows/www_stable_update.yml b/.github/workflows/www_stable_update.yml
index be3a0db582..ef6164ba5f 100644
--- a/.github/workflows/www_stable_update.yml
+++ b/.github/workflows/www_stable_update.yml
@@ -98,7 +98,7 @@ jobs:
         # Copy info.md to all directories (excluding 'images' directories)
         find . -type d -not -name "images" -execdir cp -v $WSTG_BASE/www/$VERSION_PATH/info.md {} \;
         # Set stable_version in site config
-        yq w $WWW_BASE/_config.yml stable_version $VERSION_PATH |sponge $WWW_BASE/_config.yml
+        yq -I4 w $WWW_BASE/_config.yml stable_version $VERSION_PATH |sponge $WWW_BASE/_config.yml
     - name: Setup Navigation (Versioned)
       run: |
         # Copy the current ToC for manipulation