diff --git a/app/config.py b/app/config.py
index 8e4f0e1..0f78d4a 100644
--- a/app/config.py
+++ b/app/config.py
@@ -16,6 +16,7 @@ class Config(object):
     COLOUR_BITRATE_OK = "#dcedc8"
     COLOUR_CART_ERROR = "#dc3545"
     COLOUR_CART_PLAYING = "#248f24"
+    COLOUR_CART_PROGRESSBAR = "#000000"
     COLOUR_CART_READY = "#ffc107"
     COLOUR_CART_UNCONFIGURED = "#f2f2f2"
     COLOUR_CURRENT_HEADER = "#d4edda"
diff --git a/app/musicmuster.py b/app/musicmuster.py
index 8c1cfca..75a5a9f 100755
--- a/app/musicmuster.py
+++ b/app/musicmuster.py
@@ -7,6 +7,7 @@ import sys
 import threading
 
 from datetime import datetime, timedelta
+from time import sleep
 from typing import List, Optional
 
 from PyQt5.QtCore import QDate, QEvent, Qt, QSize, QTime, QTimer
@@ -58,6 +59,9 @@ class CartButton(QPushButton):
         super().__init__(parent)
         self.parent = parent
         self.cart_id = cart.id
+        if cart.path and cart.enabled and not cart.duration:
+            tags = helpers.get_tags(cart.path)
+            cart.duration = tags['duration']
         self.duration = cart.duration
         self.path = cart.path
         self.player = None
@@ -72,9 +76,13 @@ class CartButton(QPushButton):
 
         self.pgb = QProgressBar(self, textVisible=False)
         self.pgb.setVisible(False)
+        palette = self.pgb.palette()
+        palette.setColor(QPalette.Highlight,
+                         QColor(Config.COLOUR_CART_PROGRESSBAR))
+        self.pgb.setPalette(palette)
         self.pgb.setGeometry(0, 0, self.width(), 10)
         self.pgb.setMinimum(0)
-        self.pgb.setMaximum(100)
+        self.pgb.setMaximum(1)
         self.pgb.setValue(0)
 
     def __repr__(self) -> str:
@@ -184,6 +192,9 @@ 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()
         else:
             colour = Config.COLOUR_CART_ERROR
         btn.setStyleSheet("background-color: " + colour + ";\n")
@@ -240,6 +251,16 @@ class Window(QMainWindow, Ui_MainWindow):
                 # Configure button
                 self.cart_configure(cart, btn)
 
+    def cart_progressbar(self, btn: CartButton) -> None:
+        """Manage progress bar"""
+
+        ms = 0
+        btn.pgb.setMaximum(btn.duration)
+        while ms <= btn.duration:
+            btn.pgb.setValue(ms)
+            ms += 100
+            sleep(0.1)
+
     def cart_tick(self) -> None:
         """Cart clock actions"""
 
@@ -248,11 +269,7 @@ class Window(QMainWindow, Ui_MainWindow):
             if not btn:
                 continue
             if btn.is_playing:
-                if btn.player.is_playing():
-                    # Update progress bar
-                    position = btn.player.get_position()
-                    btn.pgb.setValue(int(position * 100))
-                else:
+                if not btn.player.is_playing():
                     # Cart has finished playing
                     btn.is_playing = False
                     # Setting to position 0 doesn't seem to work