diff --git a/preamble.tex b/preamble.tex
index 2960c47..11df9e3 100644
--- a/preamble.tex
+++ b/preamble.tex
@@ -1,5 +1,8 @@
 % \renewcommand*{\chapterheadstartvskip}{}
 
+% Conform to PDF-A standard for archival
+\usepackage[a-1b]{pdfx}
+
 \usepackage[english, ngerman]{babel}
 
 \usepackage{xcolor}