diff --git a/mssh/bin/mcmd b/mssh/bin/mcmd
index b910eb7..d0a8c30 100755
--- a/mssh/bin/mcmd
+++ b/mssh/bin/mcmd
@@ -5,6 +5,8 @@ require 'pp'
 $LOAD_PATH.unshift(File.expand_path(File.dirname(__FILE__) + "/../lib"))
 require 'mcmd'
 
+require 'rubygems'
+require 'rangeclient'
 require 'optparse'
 options = {
   :maxflight => 200,
@@ -14,28 +16,28 @@ options = {
 
 optparse = OptionParser.new do |opts|
   opts.on('-r', '--range RANGE', 'currently takes a CSV list') do |arg|
-    options[:range] = arg 
+    options[:range] = arg
   end
   opts.on('-m', '--maxflight 50', 'How many subprocesses? 50 by default') do |arg|
-    options[:maxflight] = arg 
+    options[:maxflight] = arg
   end
   opts.on('-t', '--timeout 60', 'How many seconds may each individual process take? 0 for no timeout') do |arg|
-    options[:timeout] = arg 
+    options[:timeout] = arg
   end
   opts.on('-g', '--global_timeout 600', 'How many seconds for the whole shebang 0 for no timeout') do |arg|
-    options[:global_timeout] = arg 
+    options[:global_timeout] = arg
   end
   opts.on('--noshell', "Don't invoke a shell. Args will be passed to exec verbatim ") do |arg|
-    options[:noshell] = arg 
+    options[:noshell] = arg
   end
   opts.on('-c', '--collapse', "Collapse similar output ") do |arg|
-    options[:collapse] = arg 
+    options[:collapse] = arg
   end
   opts.on('-v', '--verbose', "Verbose output") do |arg|
-    options[:verbose] = arg 
+    options[:verbose] = arg
   end
   opts.on('-d', '--debug', "Debug output") do |arg|
-    options[:debug] = arg 
+    options[:debug] = arg
   end
   # option to merge stdin/stdout into one buf? how should this work?
   # option to ignore as-we-go yield output - this is off by default now except for success/fail
@@ -47,7 +49,9 @@ raise "Error, need command to run" if ARGV.size.zero?
 
 m = MultipleCmd.new
 
-targets = options[:range].split ","
+range = Range::Client.new
+targets = []
+targets.push(*range.expand(options[:range]))
 
 m.commands = targets.map { |t| ["/bin/sh", "-c"].push ARGV.map { |arg| arg.gsub('HOSTNAME', t)}.join " " }
 command_to_target = Hash.new
diff --git a/mssh/mssh.gemspec b/mssh/mssh.gemspec
index 4cee909..1b6804e 100644
--- a/mssh/mssh.gemspec
+++ b/mssh/mssh.gemspec
@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 Gem::Specification.new do |s|
   s.name        = "mssh"
-  s.version     = "0.0.9"
+  s.version     = "0.0.10"
   s.platform    = Gem::Platform::RUBY
   s.authors     = ["Evan Miller"]
   s.email       = ["github@squareup.com"]
@@ -13,6 +13,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "json"
   s.add_dependency "io-poll"
+  s.add_dependency "rangeclient"
   s.default_executable = %q{mssh}
   s.executables = %W{ mssh mcmd }