diff --git a/README.md b/README.md
index a9ce329..c7b2bd0 100644
--- a/README.md
+++ b/README.md
@@ -11,8 +11,9 @@ Review and run the `bootstrap.sh` script to generate the EPUB and MOBI files
 Requirements:
 
 - Ruby
-- bundler
-- Installs nokogiri
+- gem install bundler
+- gem install nokogiri
+- brew cask install calibre
 
 # Known Issues
 
diff --git a/bootstrap.sh b/bootstrap.sh
index 80e2014..3b8286e 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -12,7 +12,7 @@ cd ..
 bundle install
 ruby generate.rb
 
-cd html/chapters
-
+pushd html/chapters
 pandoc -f html+smart -t epub+smart -o ../../google-sre.epub --epub-metadata=../../metadata.xml --epub-cover-image=../../cover.jpg sre.html
+popd
 ebook-convert google-sre.epub google-sre.mobi