diff --git a/usr/local/bin/install_to_disk.sh b/usr/local/bin/install_to_disk.sh
index e48e206..e227f8d 100755
--- a/usr/local/bin/install_to_disk.sh
+++ b/usr/local/bin/install_to_disk.sh
@@ -340,6 +340,51 @@ if sudo mount "$TARGET_ROOT_PART" "$TEMP_MOUNT" 2>/dev/null; then
         sudo cp "$TEMP_MOUNT/etc/fstab" "$TEMP_MOUNT/etc/fstab.backup" || echo "Warning: Could not backup fstab"
     fi
     
+    # Also mount and update GRUB config on EFI partition
+    EFI_MOUNT="/mnt/stormux_efi"
+    sudo mkdir -p "$EFI_MOUNT"
+    
+    # Find EFI partition (should be partition 2)
+    EFI_PART="${TARGET_DEVICE}2"
+    if [[ "$TARGET_DEVICE" =~ nvme|mmcblk ]]; then
+        EFI_PART="${TARGET_DEVICE}p2"
+    fi
+    
+    if sudo mount "$EFI_PART" "$EFI_MOUNT" 2>/dev/null; then
+        echo "Updating GRUB configuration with new UUIDs..."
+        if [[ -f "$EFI_MOUNT/grub/grub.cfg" && ${#uuid_mappings[@]} -gt 0 ]]; then
+            # Backup original grub config
+            sudo cp "$EFI_MOUNT/grub/grub.cfg" "$EFI_MOUNT/grub/grub.cfg.backup" || echo "Warning: Could not backup grub.cfg"
+            
+            # Apply UUID updates to grub config
+            grub_temp=$(mktemp)
+            sudo cp "$EFI_MOUNT/grub/grub.cfg" "$grub_temp"
+            
+            for mapping in "${uuid_mappings[@]}"; do
+                if [[ "$mapping" =~ ^UUID_MAPPING:([^:]+):([^:]+)$ ]]; then
+                    grub_old_uuid="${BASH_REMATCH[1]}"
+                    grub_new_uuid="${BASH_REMATCH[2]}"
+                    
+                    # Replace old UUID with new UUID in grub config
+                    sed -i "s/${grub_old_uuid}/${grub_new_uuid}/g" "$grub_temp"
+                    echo "Updated grub.cfg: $grub_old_uuid -> $grub_new_uuid"
+                fi
+            done
+            
+            # Copy updated grub config back
+            sudo cp "$grub_temp" "$EFI_MOUNT/grub/grub.cfg"
+            rm -f "$grub_temp"
+            echo "GRUB configuration updated successfully"
+        else
+            echo "No GRUB config found or no UUID mappings to update"
+        fi
+        
+        sudo umount "$EFI_MOUNT"
+    else
+        echo "Warning: Could not mount EFI partition $EFI_PART"
+    fi
+    sudo rmdir "$EFI_MOUNT"
+
 # Restore speech
 echo "command toggletempdisablespeech" | socat - UNIX-CLIENT:/tmp/fenrirscreenreader-deamon.sock