diff --git a/doc/7-icinga-template-library.md b/doc/7-icinga-template-library.md
index 5a89bb1d1..a3799ffd3 100644
--- a/doc/7-icinga-template-library.md
+++ b/doc/7-icinga-template-library.md
@@ -95,9 +95,19 @@ which contains the path of the plugins from the Monitoring Plugins project.
 
 ### <a id="plugin-check-command-apt"></a> apt
 
-Check command for the `check_apt` plugin.
+The plugin `apt` is used to check the aptitude package management system for updates on Debian based systems.
 
-The `apt` check command does not support any vars.
+Custom attributes passed as [command parameters](3-monitoring-basics.md#command-passing-parameters):
+
+Name                    | Description
+------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+apt_extra_opts          | **Optional.** Read options from an ini file.
+apt_upgrade             | **Optional.** [Default] Perform an upgrade. If an optional OPTS argument is provided, apt-get will be run with these command line options instead of the default.
+apt_dist_upgrade        | **Optional.** Perform a dist-upgrade instead of normal upgrade. Like with -U OPTS can be provided to override the default options.
+apt_include             | **Optional.** Include only packages matching REGEXP. Can be specified multiple times the values will be combined together.
+apt_exclude             | **Optional.** Exclude packages matching REGEXP from the list of packages that would otherwise be included. Can be specified multiple times.
+apt_critical            | **Optional.** If the full package information of any of the upgradable packages match this REGEXP, the plugin will return CRITICAL status. Can be specified multiple times.
+apt_timeout             | **Optional.** Seconds before plugin times out (default: 10).
 
 
 ### <a id="plugin-check-command-by-ssh"></a> by_ssh
diff --git a/itl/command-plugins.conf b/itl/command-plugins.conf
index 8d640a4d4..3408a9abc 100644
--- a/itl/command-plugins.conf
+++ b/itl/command-plugins.conf
@@ -1181,6 +1181,38 @@ object CheckCommand "apt" {
 	import "plugin-check-command"
 
 	command = [ PluginDir + "/check_apt" ]
+
+	arguments = {
+		"--extra-opts" = {
+			value = "$apt_extra_opts$"
+			description = "Read options from an ini file."
+		}
+		"--upgrade" = {
+			value = "$apt_upgrade$"
+			description = "[Default] Perform an upgrade. If an optional OPTS argument is provided, apt-get will be run with these command line options instead of the default."
+		}
+		"--dist-upgrade" = {
+			value = "$apt_dist_upgrade$"
+			description = "Perform a dist-upgrade instead of normal upgrade. Like with -U OPTS can be provided to override the default options."
+		}
+		"--include" = {
+			value = "$apt_include$"
+			description = "Include only packages matching REGEXP. Can be specified multiple times the values will be combined together."
+		}
+		"--exclude" = {
+			value = "$apt_exclude$"
+			description = "Exclude packages matching REGEXP from the list of packages that would otherwise be included. Can be specified multiple times."
+		}
+		"--critical" = {
+			value = "$apt_critical$"
+			description = "If the full package information of any of the upgradable packages match this REGEXP, the plugin will return CRITICAL status. Can be specified multiple times."
+		}
+		"--timeout" = {
+			value = "$apt_timeout$"
+			description = "Seconds before plugin times out (default: 10)."
+		}
+	}
+
 }
 
 object CheckCommand "dhcp" {