diff --git a/.gitea/workflows/docker.yml b/.gitea/workflows/docker.yml
index 753b9b0..c4b6a88 100644
--- a/.gitea/workflows/docker.yml
+++ b/.gitea/workflows/docker.yml
@@ -21,6 +21,13 @@ on:
 env:
   HOMELAB_API_URL: https://t4tgw-api.ffaerber.duckdns.org
 
+# Gitea derives the automatic token's scopes from this block; without it the
+# token cannot write packages and `docker login` to this instance's registry
+# fails with a bare "unauthorized".
+permissions:
+  contents: read
+  packages: write
+
 jobs:
   build:
     runs-on: ci-runner