diff --git a/doc/crypt.tex b/doc/crypt.tex
index dbe67e8..cb88eb7 100644
--- a/doc/crypt.tex
+++ b/doc/crypt.tex
@@ -1,5 +1,5 @@
 \documentclass[synpaper]{book}
-\usepackage[dvips]{geometry}
+\usepackage{geometry}
 \usepackage{hyperref}
 \usepackage{makeidx}
 \usepackage{amssymb}