diff --git a/Makefile b/Makefile
index 836c63a495314bd3571bc9ede499bf2cfa335060..1e12126095711e62047db5177ccf2ad705254262 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ STYLES := css/tufte-css/tufte.css \
 all: index.html
 
 index.html: index.md Makefile
-	pandoc -o $@ $< -t html5 -c css/tufte-css/tufte.css
+	pandoc -o $@ $< -t html5 --css css/tufte-css/tufte.css -s
 
 deploy: all
 	mkdir -p site