diff --git a/strings.py b/strings.py
index 2c2a798..85f86c8 100644
--- a/strings.py
+++ b/strings.py
@@ -113,6 +113,10 @@ conversation_live_orders_start = "Sei in modalità di <b>Ricezione Ordini</b>!\n
 # Conversation: help menu has been opened
 conversation_open_help_menu = "Che tipo di assistenza desideri ricevere?"
 
+# Conversation: confirm promotion to admin
+conversation_confirm_admin_promotion = "Sei sicuro di voler promuovere questo utente a 💼 Gestore?\n" \
+                                       "E' un'azione irreversibile!"
+
 # Conversation: switching to user mode
 conversation_switch_to_user_mode = "Stai passando alla modalità 👤 Cliente.\n" \
                                    "Se vuoi riassumere il ruolo di 💼 Gestore, riavvia la conversazione con /start."
diff --git a/worker.py b/worker.py
index 6914232..fd81fdd 100644
--- a/worker.py
+++ b/worker.py
@@ -486,9 +486,9 @@ class ChatWorker(threading.Thread):
             value -= cart[product][0].price * cart[product][1]
             # Create {quantity} new OrderItems
             for i in range(0, cart[product][1]):
-                orderitem = db.OrderItem(product=cart[product][0],
-                                         order_id=order.order_id)
-                self.session.add(orderitem)
+                order_item = db.OrderItem(product=cart[product][0],
+                                          order_id=order.order_id)
+                self.session.add(order_item)
         # Ensure the user has enough credit to make the purchase
         if self.user.credit + value < 0:
             self.bot.send_message(self.chat.id, strings.error_not_enough_credit)
@@ -1141,7 +1141,7 @@ class ChatWorker(threading.Thread):
         admin = self.session.query(db.Admin).filter_by(user_id=user.user_id).one_or_none()
         if admin is None:
             # Create the keyboard to be sent
-            keyboard = telegram.ReplyKeyboardMarkup([[strings.emoji_yes, strings.emoji_no]])
+            keyboard = telegram.ReplyKeyboardMarkup([[strings.emoji_yes, strings.emoji_no]], one_time_keyboard=True)
             # Ask for confirmation
             self.bot.send_message(self.chat.id, strings.conversation_confirm_admin_promotion, reply_markup=keyboard)
             # Wait for an answer
@@ -1156,6 +1156,7 @@ class ChatWorker(threading.Thread):
                              create_transactions=False,
                              is_owner=False,
                              display_on_help=False)
+            self.session.add(admin)
         # Send the empty admin message and record the id
         message = self.bot.send_message(self.chat.id, strings.admin_properties.format(name=str(admin.user)))
         # Start accepting edits