diff --git a/.gitea/workflows/legal-manifest.yml b/.gitea/workflows/legal-manifest.yml
index 6509462..3b65a8a 100644
--- a/.gitea/workflows/legal-manifest.yml
+++ b/.gitea/workflows/legal-manifest.yml
@@ -40,8 +40,10 @@ jobs:
       - name: Build manifest
         run: python3 scripts/build-manifest.py
 
+      # v4 uses a newer artifact-storage protocol this Gitea version doesn't implement yet
+      # ("GHESNotSupportedError", confirmed empirically) — v3 uses the older, supported one.
       - name: Upload manifest + rendered artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: legal-manifest
           path: dist/