From 85faf76442ba646065cfb1d3630695cb7c62ab9b Mon Sep 17 00:00:00 2001
From: mara004 <65915611+mara004@users.noreply.github.com>
Date: Sat, 27 Nov 2021 11:59:09 +0100
Subject: [PATCH] Use capitalised `Root`

Lower-case `root` is deprecated and doesn't work with newer versions of pikepdf.
---
 pdflayers/utils.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pdflayers/utils.py b/pdflayers/utils.py
index ac41edd..7470996 100644
--- a/pdflayers/utils.py
+++ b/pdflayers/utils.py
@@ -10,7 +10,7 @@ logger = logging.getLogger(__name__)
 def set_layer_visibility(pdf, layers_to_show):
     """Set visibility of layers."""
     try:
-        ocgs = pdf.root.OCProperties.OCGs
+        ocgs = pdf.Root.OCProperties.OCGs
     except (AttributeError, KeyError):
         logger.error("Unable to locate layers in PDF.")
         sys.exit(1)
@@ -29,7 +29,7 @@ def set_layer_visibility(pdf, layers_to_show):
         Order=ocgs,
     )
 
-    pdf.root.OCProperties = pikepdf.Dictionary(
+    pdf.Root.OCProperties = pikepdf.Dictionary(
         D=ocgs_config,
         OCGs=ocgs,
     )