diff --git a/README.md b/README.md
index bd15cec..47dec76 100644
--- a/README.md
+++ b/README.md
@@ -31,9 +31,9 @@ npm run preview   # Serve build/
 
 ## Deploy
 
-Auto-deploy lên GitHub Pages từ `main` qua `actions/deploy-pages@v4`. Xem `RUNBOOK.md` để rollback / chuyển domain.
+Auto-deploy lên GitHub Pages từ `main`. Cấu hình và phiên bản action nằm trong `.github/workflows/deploy.yml`; xem `RUNBOOK.md` để rollback / chuyển domain.
 
-Live URL: https://tiennm99.github.io/mathmax/
+Live URL: https://tiennm99dev.github.io/mathmax/
 
 ## Architecture
 
diff --git a/RUNBOOK.md b/RUNBOOK.md
index 27b3e30..9247999 100644
--- a/RUNBOOK.md
+++ b/RUNBOOK.md
@@ -4,9 +4,9 @@
 
 Production deploys from `main` via GitHub Actions (`.github/workflows/deploy.yml`).
 
-- Live URL: `https://tiennm99.github.io/mathmax/`
+- Live URL: `https://tiennm99dev.github.io/mathmax/`
 - Build: `npm run build` (SvelteKit static, output to `build/`)
-- Deploy mechanism: `actions/upload-pages-artifact@v3` + `actions/deploy-pages@v4`
+- Deploy mechanism: `actions/upload-pages-artifact` + `actions/deploy-pages`, phiên bản pin trong `.github/workflows/deploy.yml`
 - Concurrency: `pages-deploy` group, cancel-in-progress disabled (so a force-pushed retry doesn't abort an in-flight rollback)
 
 ## Rollback
@@ -33,7 +33,7 @@ Per plan, buy a `.vn` / `.com.vn` domain only when ANY of:
 2. **1 organic teacher share** (Facebook group, Zalo, or school chat — verified, not founder-initiated), OR
 3. **≥5 modules shipped** (signals content sustainability and amortizes the domain cost)
 
-If none hit within 90 days of soft launch, stay on `tiennm99.github.io/mathmax/`.
+If none hit within 90 days of soft launch, stay on `tiennm99dev.github.io/mathmax/`.
 
 When the trigger fires: