diff --git a/asciidoc/dblatex-custom.sty b/asciidoc/dblatex-custom.sty
index 6b2578c..90e5413 100644
--- a/asciidoc/dblatex-custom.sty
+++ b/asciidoc/dblatex-custom.sty
@@ -30,6 +30,8 @@
 
 % For DocBook literallayout elements, see `./dblatex/dblatex-readme.txt`.
 \usepackage{alltt}
+% To preserve simple quotes in the blocks of code
+\usepackage{upquote}
 
 \definecolor{proxmoxred}{RGB}{229, 112, 0}
 \definecolor{proxmoxgrey1}{RGB}{229, 229, 229}