diff --git a/.github/workflows/site.yml b/.github/workflows/site.yml
index 240c839..57201f7 100644
--- a/.github/workflows/site.yml
+++ b/.github/workflows/site.yml
@@ -29,6 +29,12 @@ jobs:
     uses: jlt-commons/ci-builds/.github/workflows/site.yml@main
     with:
       base-path: /glitter-gl
+      # v0.3.0 adds a default Contributing page to every project's guide
+      # (docs-engine README, "The default Contributing page"). Pinned
+      # explicitly instead of riding the shared workflow's own default,
+      # so this project's build doesn't shift again the next time that
+      # default moves.
+      docs-engine-ref: v0.3.0
     permissions:
       contents: read
       pages: write