diff --git a/README.md b/README.md
index e4aeafc..2d3200b 100644
--- a/README.md
+++ b/README.md
@@ -25,4 +25,5 @@ $ cd tool
 $ go build generate.go
 $ cd ..
 $ tool/generate src/063-line-filters/line-filters.go 'Line Filters' > build/line-filters.html
-$ prince build/line-filters.html -o build/line-filters.pdf
\ No newline at end of file
+$ prince build/line-filters.html -o build/line-filters.pdf
+```