diff --git a/app/musicmuster.py b/app/musicmuster.py
index aac5f2f..6e5f86f 100755
--- a/app/musicmuster.py
+++ b/app/musicmuster.py
@@ -10,7 +10,7 @@ from datetime import datetime, timedelta
 from time import sleep
 from typing import List, Optional
 
-from PyQt5.QtCore import QDate, QEvent, Qt, QSize, QTime, QTimer
+from PyQt5.QtCore import pyqtSignal, QDate, QEvent, Qt, QSize, QTime, QTimer
 from PyQt5.QtGui import QColor, QFont, QPalette, QResizeEvent
 from PyQt5.QtWidgets import (
     QApplication,
@@ -53,6 +53,8 @@ from utilities import check_db, update_bitrates
 class CartButton(QPushButton):
     """Button for playing carts"""
 
+    progress = pyqtSignal(int)
+
     def __init__(self, parent: QMainWindow, cart: Carts):
         """Create a cart pushbutton and set it disabled"""
 
@@ -85,6 +87,8 @@ class CartButton(QPushButton):
         self.pgb.setMaximum(1)
         self.pgb.setValue(0)
 
+        self.progress.connect(self.pgb.setValue)
+
     def __repr__(self) -> str:
         return (
             f"<CartButton(cart_id={self.cart_id} "
@@ -195,9 +199,9 @@ class Window(QMainWindow, Ui_MainWindow):
             btn.player.play()
             btn.is_playing = True
             colour = Config.COLOUR_CART_PLAYING
-            # thread = threading.Thread(target=self.cart_progressbar,
-            #                           args=(btn,))
-            # thread.start()
+            thread = threading.Thread(target=self.cart_progressbar,
+                                      args=(btn,))
+            thread.start()
         else:
             colour = Config.COLOUR_CART_ERROR
         btn.setStyleSheet("background-color: " + colour + ";\n")
@@ -260,7 +264,7 @@ class Window(QMainWindow, Ui_MainWindow):
         ms = 0
         btn.pgb.setMaximum(btn.duration)
         while ms <= btn.duration:
-            btn.pgb.setValue(ms)
+            btn.progress.emit(ms)
             ms += 100
             sleep(0.1)