bin/chromedriver_update in chromedriver_update-0.2.0 vs bin/chromedriver_update in chromedriver_update-0.2.1

@@ -4,19 +4,21 @@
 
 arg = ARGV[0]
 
 if %w[version -v --version].include?(arg)
   puts "#{ChromedriverUpdate::VERSION}"
-elsif arg.nil? || arg == ''
-  ChromedriverUpdate.auto_update_chromedriver
+elsif arg.nil? || arg == '' || %w[force -f --force].include?(arg)
+  force = %w[force -f --force].include?(arg)
+  ChromedriverUpdate.auto_update_chromedriver force: force
 else
   puts <<-TEXT
     
     chromedriver_update #{ChromedriverUpdate::VERSION}
     https://github.com/magynhard/chromedriver_update
 
+    chromedriver_update               # automatically update the current chromedriver version fitting to the currently installed chrome
+    chromedriver_update -f --force    # force automatic update, even if the latest version is already installed
     chromedriver_update -h --help     # show this info
     chromedriver_update -v --version  # show the libraries current version
-    chromedriver_update               # automatically update the current chromedriver version fitting to the currently installed chrome
 
   TEXT
 end
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