diff --git a/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py b/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py
index 385ecc0e..fd386239 100644
--- a/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py
+++ b/bec_widgets/widgets/containers/main_window/addons/notification_center/notification_banner.py
@@ -63,7 +63,7 @@ LIGHT_PALETTE = {
 
 
 def _connect_theme_change(slot) -> None:
-    """Connect *slot* to the available application theme-change signals."""
+    """Connect *slot* to the application theme-change signal."""
     qapp = QApplication.instance()
     if qapp is None:
         return
@@ -72,10 +72,6 @@ def _connect_theme_change(slot) -> None:
     if hasattr(theme, "theme_changed"):
         theme.theme_changed.connect(slot)
 
-    legacy_signal = getattr(qapp, "theme_signal", None)
-    if hasattr(legacy_signal, "theme_updated"):
-        legacy_signal.theme_updated.connect(slot)
-
 
 class NotificationToast(QFrame):
     """