diff --git a/misc/preamble.tex b/misc/preamble.tex
index 8ca426ae74f1c739fd4c885fa992ca6ee1260066..a7f7b4895c6800ef1413d24f9a00a2a5d374a459 100644
--- a/misc/preamble.tex
+++ b/misc/preamble.tex
@@ -7,6 +7,8 @@
 \usepackage{lmodern} % original CM font doesn't work well with [T1]{fontenc}
 % use different sans font
 \usepackage[semibold]{sourcesanspro}
+\usepackage{microtype}
+\usepackage[all, defaultlines=2]{nowidow}
 
 % set language
 \ifenglish%
diff --git a/paper.pdf b/paper.pdf
index 43c50d4b35ff1979c1a98d04fa6868a867719212..9388ba7c94aa2cb9a73d79d3bc6d8a2a9073fcb1 100644
Binary files a/paper.pdf and b/paper.pdf differ