diff --git a/sphinx-tools/update_pdf_bookmarks.py b/sphinx-tools/update_pdf_bookmarks.py
index 3465a3a..e70125d 100644
--- a/sphinx-tools/update_pdf_bookmarks.py
+++ b/sphinx-tools/update_pdf_bookmarks.py
@@ -18,7 +18,8 @@ with open(bookmarks_filename) as bookmarks_file:
 # Offset page numbers
 def replaceBookmarkPageNumber(match):
 	initial_page = int(match.group(1))
-	return 'BookmarkPageNumber: ' + str(initial_page + 2)
+	final_page = initial_page + 2 if initial_page > 1 else initial_page
+	return 'BookmarkPageNumber: ' + str(final_page)
 metadata = re.sub('BookmarkPageNumber:\s+([0-9]+)', replaceBookmarkPageNumber, metadata)
 
 with open(bookmarks_filename, 'w') as bookmarks_file: