diff --git a/AU/Plugins/Gist.ps1 b/AU/Plugins/Gist.ps1
index 6a62343e..e53fb5a0 100644
--- a/AU/Plugins/Gist.ps1
+++ b/AU/Plugins/Gist.ps1
@@ -1,6 +1,14 @@
 # Author: Miodrag Milic <miodrag.milic@gmail.com>
-# Last Change: 07-Nov-2016.
-
+# Last Change: 10-Nov-2016.
+<#
+.SYNOPSIS
+    Create update history as markdown report using git commit log.
+
+.DESCRIPTION
+   Shows one date per line and all of the packages pushed to the Chocolatey community repository during that day.
+   First letter of the package name links to report (produced by the Report plugin), the rest links to actuall
+   commit (produced by the Git plugin).
+#>
 param(
     $Info,
 
diff --git a/AU/Plugins/History.ps1 b/AU/Plugins/History.ps1
index 624d90c3..bd375fe6 100644
--- a/AU/Plugins/History.ps1
+++ b/AU/Plugins/History.ps1
@@ -1,10 +1,25 @@
 # Author: Miodrag Milic <miodrag.milic@gmail.com>
 # Last Change: 10-Nov-2016.
 
+<#
+.SYNOPSIS
+    Create update history as markdown report
+
+.DESCRIPTION
+    Shows one date per line and all of the packages pushed to the Chocolatey community
+    repository during that day. First letter of the package name links to report
+    (produced by the Report plugin), the rest links to the actuall commit (produced by the Git plugin).
+#>
 param(
     $Info,
+
+    #Number of dates to show in the report
     $Lines=30,
+
+    #Github user repository, used to create commit links
     $Github_UserRepo = 'chocolatey/chocolatey-coreteampackages',
+
+    #File path where to save the markdown report
     $Path = "UpdateHistory.md"
 )
 
diff --git a/AU/Plugins/Report.ps1 b/AU/Plugins/Report.ps1
index 5f7c7206..af72f860 100644
--- a/AU/Plugins/Report.ps1
+++ b/AU/Plugins/Report.ps1
@@ -1,10 +1,24 @@
 # Author: Miodrag Milic <miodrag.milic@gmail.com>
-# Last Change: 24-Sep-2016.
+# Last Change: 10-Nov-2016.
+<#
+.SYNOPSIS
+    Create different types of reports about the current run.
+
+.DESCRIPTION
+    The plugin saves state of all packages in a file that can be used locally or
+    uploaded via other plugins to remote (such as Gist or Mail).
+#>
 
 param(
     $Info,
+
+    # Type of the report, currently 'markdown' or 'text'
     [string] $Type = 'markdown',
+
+    # Path where to save the report
     [string] $Path = 'Update-AUPackages.md',
+
+    # Report parameters
     [HashTable] $Params
 )
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 680f9587..3bfc3090 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - `Update-AUPackages`
   - New parameters for markdown report - `IconSize` and `NoIcons`. Icons are now shown by default.
   - New plugin `History` that creates markdown report of package updates grouped by dates.
+  - Plugins documentation updated.
 - Refactoring
 
 ### Bugfixes