diff --git a/duolingo.tex b/duolingo.tex
index b6786b0..dd71aaf 100644
--- a/duolingo.tex
+++ b/duolingo.tex
@@ -1,4 +1,5 @@
 \documentclass[12pt]{report}
+\usepackage[a4paper]{geometry}
 \usepackage[hidelinks]{hyperref}
 \usepackage[utf8]{inputenc}
 \usepackage{ae,lmodern}