diff --git a/Rakefile b/Rakefile
index 6435eda..9f81f45 100644
--- a/Rakefile
+++ b/Rakefile
@@ -100,7 +100,7 @@ end
 
 desc "generate grouped printable version (PDF) of schematic"
 rule ".sch-all.pdf" => ["#{name}.sch.pdf"] + sheets.collect{|sheet| "#{sheet}.sch.pdf"} do |t|
-  sh "pdfcat --output #{t.name} " + t.prerequisites * " "
+  sh "mutool merge -o #{t.name} " + t.prerequisites * " "
 end
 
 desc "generate printable version (PostScript) of board layout"