diff --git a/bin/whenever b/bin/whenever
index 70a5bff6..bcb26433 100755
--- a/bin/whenever
+++ b/bin/whenever
@@ -20,6 +20,9 @@ OptionParser.new do |opts|
     options[:clear] = true
     options[:identifier] = identifier if identifier
   end
+  opts.on('-p', '--purge') do |identifier|
+    options[:clear_all] = true
+  end
   opts.on('-s', '--set [variables]', 'Example: --set \'environment=staging&path=/my/sweet/path\'') do |set|
     options[:set] = set if set
   end
diff --git a/lib/whenever/command_line.rb b/lib/whenever/command_line.rb
index 46dd8a9f..70ecc468 100644
--- a/lib/whenever/command_line.rb
+++ b/lib/whenever/command_line.rb
@@ -18,8 +18,8 @@ def initialize(options={})
         exit(1)
       end
 
-      if [@options[:update], @options[:write], @options[:clear]].compact.length > 1
-        warn("[fail] Can only update, write or clear. Choose one.")
+      if [@options[:update], @options[:write], @options[:clear], options[:clear_all]].compact.length > 1
+        warn("[fail] Can only update, write, clear or clear_all. Choose one.")
         exit(1)
       end
 
@@ -33,6 +33,16 @@ def initialize(options={})
     def run
       if @options[:update] || @options[:clear]
         write_crontab(updated_crontab)
+      elsif @options[:clear_all]
+        # Create a file if doesn't exist
+        system "crontab -l | sed 's/>/>>/' | crontab - "
+        # Remove crontab
+        system "crontab -r"
+        # Reinitialize
+        system "crontab -l | sed 's/>/>>/' | crontab - "
+
+        puts '[reset] Success to reboot crontab'
+        exit(0)
       elsif @options[:write]
         write_crontab(whenever_cron)
       else