diff --git a/README.md b/README.md
index 751fee8..9cb8ddf 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,7 @@
 
  3. rails
 
- 4. sshpass
-
- 5. sudo privileges **"without password"** [(see here)](http://askubuntu.com/questions/147241/execute-sudo-without-password)
+ 4. sudo privileges **"without password"** [(see here)](http://askubuntu.com/questions/147241/execute-sudo-without-password)
 
 
 *Setup:*
diff --git a/script/setup.sh b/script/setup.sh
index 1ed0737..e90f85b 100755
--- a/script/setup.sh
+++ b/script/setup.sh
@@ -3,8 +3,10 @@
 #version check
 if grep centos /etc/*-release; then
 echo "os : centos, use yum"
+sudo apt-get install sshpass
 elif grep ubuntu /etc/*-release; then
 echo "os : ubuntu, use apt-get install"
+yum install sshpass
 fi
 
 # setup