diff --git a/app/app.py b/app/app.py
index 1f44273..59094c2 100644
--- a/app/app.py
+++ b/app/app.py
@@ -55,6 +55,29 @@ def queue_admin_generate():
 # ================
 #   DECORATORS
 # ================
+def enforce_plan_limits(f):
+    @wraps(f)
+    def wrapper(*args, **kwargs):
+        db = SessionLocal()
+
+        if app.config["AUTH_MODE"] == "oauth":
+            email = session["user"]["email"]
+        else:
+            email = session["db_user"]["email"]
+
+        user = db.query(User).filter_by(email=email).first()
+        plan = db.query(Plan).filter_by(id=user.plan_id).first()
+
+        # Limite de conversas
+        conv_count = db.query(Conversation).filter_by(user_email=email).count()
+        if conv_count >= plan.max_conversations:
+            db.close()
+            return jsonify({"erro": "Você atingiu o limite de conversas do seu plano."}), 403
+
+        db.close()
+        return f(*args, **kwargs)
+    return wrapper
+
 
 def require_subscription(f):
     @wraps(f)