diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index 8823710..074ae21 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -61,8 +61,11 @@ jobs:
             exit 1
           fi
 
+      # Pin to v3 — Gitea Actions implements the v3 artifact protocol.
+      # upload/download-artifact@v4 talk to a github.com-only backend and
+      # fail with GHESNotSupportedError on Gitea / Forgejo / GHES.
       - name: Upload dist artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: dist
           path: dist/
@@ -75,7 +78,7 @@ jobs:
 
     steps:
       - name: Download dist artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: dist
           path: dist/