diff --git a/unixconf.sh b/unixconf.sh
index 2e07dbd..9e3878f 100755
--- a/unixconf.sh
+++ b/unixconf.sh
@@ -1,13 +1,13 @@
 #!/bin/sh
 
 gitlink="https://gitlab.cpy.re/florian/unixconf/repository/archive.zip?ref=master"
-musthaves="zsh wget git vim ssh-agent urxvt unzip"
+musthaves="zsh wget git vim ssh-agent urxvt unzip ruby"
 
 for musthave in $musthaves; do
   which "$musthave" >/dev/null 2>&1
   if [ "$?" -ne 0 ]; then
     echo "You should install ${musthave}."
-    echo "On Debian: apt-get install zsh wget git vim openssh-client rxvt-unicode unzip"
+    echo "On Debian: apt-get install zsh wget git vim openssh-client rxvt-unicode unzip ruby"
     exit
   fi
 done