diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 3e78dcf..1cd3848 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,6 +9,9 @@ on:
 jobs:
   publish:
     runs-on: ubuntu-latest
+    # The production environment's protection rules (required reviewer,
+    # deployment branches) gate every publish here.
+    environment: production
 
     permissions:
       contents: read