diff --git a/Cabal/doc/Cabal.css b/Cabal/doc/Cabal.css
index a559ddff940a20f483cd163ec38c0f63b3253ec5..82ce3ec401bbb8cba531178802b793f5d1f6a1fb 100644
--- a/Cabal/doc/Cabal.css
+++ b/Cabal/doc/Cabal.css
@@ -1,3 +1,7 @@
+body {
+  max-width: 18cm;
+}
+
 div {
   font-family: sans-serif;
   color: black;