diff --git a/Setup/8_Plymouth.sh b/Setup/8_Plymouth.sh
index bd86a94..ef7618a 100755
--- a/Setup/8_Plymouth.sh
+++ b/Setup/8_Plymouth.sh
@@ -44,14 +44,14 @@ GRUB_CFG="/etc/default/grub"
 GRUB_BACKUP="/etc/default/grub.bak"
 
 echo "🔍 Überprüfe GRUB-Einstellungen..."
-NEW_CMDLINE='quiet splash vt.global_cursor_default=0 loglevel=3 rd.luks.options=discard plymouth.ignore-serial-consoles'
+NEW_CMDLINE="quiet splash vt.global_cursor_default=0 loglevel=3 rd.luks.options=discard plymouth.ignore-serial-consoles"
 
-if grep -q "^GRUB_CMDLINE_LINUX_DEFAULT=.*$NEW_CMDLINE.*" "$GRUB_CFG"; then
-    echo "✅ GRUB-Konfiguration bereits aktuell."
+if grep -q "^GRUB_CMDLINE_LINUX_DEFAULT=.*" "$GRUB_CFG"; then
+    sed -i "s|^GRUB_CMDLINE_LINUX_DEFAULT=.*|GRUB_CMDLINE_LINUX_DEFAULT=\"$NEW_CMDLINE\"|" "$GRUB_CFG"
+    echo "🔄 GRUB wird aktualisiert..."
+    update-grub
 else
-    echo "🔄 Aktualisiere GRUB-Parameter..."
-    cp "$GRUB_CFG" "$GRUB_BACKUP"
-    sed -i 's/^GRUB_CMDLINE_LINUX_DEFAULT=.*/GRUB_CMDLINE_LINUX_DEFAULT="'$NEW_CMDLINE'"/' "$GRUB_CFG"
+    echo "GRUB_CMDLINE_LINUX_DEFAULT=\"$NEW_CMDLINE\"" >> "$GRUB_CFG"
     echo "🔄 GRUB wird aktualisiert..."
     update-grub
 fi