diff --git a/requirements.txt b/requirements.txt
index a928d5a..5809f6f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,6 +44,7 @@ pandas>=2.0.0
 
 # ── CostGuard App (Fase B1-B5) ────────────────────────────────────────────────
 google-cloud-billing>=1.12.0
+google-cloud-billing-budgets>=1.4.0
 google-cloud-firestore>=2.16.0
 firebase-admin>=6.5.0
 cachetools>=5.3.3