diff --git a/packages/kopano-ol-extension-nightly/kopano-ol-extension-nightly.nuspec b/packages/kopano-ol-extension-nightly/kopano-ol-extension-nightly.nuspec
index bd7cd9d..73fb024 100755
--- a/packages/kopano-ol-extension-nightly/kopano-ol-extension-nightly.nuspec
+++ b/packages/kopano-ol-extension-nightly/kopano-ol-extension-nightly.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
     <metadata>
         <id>kopano-ol-extension-nightly</id>
-        <version>1.5.218</version>
+        <version>1.5.239</version>
         <title>Kopano Outlook Extension</title>
         <authors>Kopano</authors>
         <owners>foo.li systeme + software</owners>
@@ -12,7 +12,7 @@
         <requireLicenseAcceptance>true</requireLicenseAcceptance>
         <description>Kopano Outlook Extension (nightly)</description>
         <summary>Kopano OL Extension Nightly (unsupported)</summary>
-        <releaseNotes>upgrade to 1.5.218 (02-08-2017)</releaseNotes>
+        <releaseNotes>upgrade to 1.5.239 (27-09-2017)</releaseNotes>
         <copyright>2017 Kopano</copyright>
         <language />
         <tags>groupware kopano outlook-extension nightly</tags>
diff --git a/packages/kopano-ol-extension-nightly/tools/chocolateyinstall.ps1 b/packages/kopano-ol-extension-nightly/tools/chocolateyinstall.ps1
index 0449985..53db2da 100755
--- a/packages/kopano-ol-extension-nightly/tools/chocolateyinstall.ps1
+++ b/packages/kopano-ol-extension-nightly/tools/chocolateyinstall.ps1
@@ -6,13 +6,13 @@ $packageName    = 'kopano-ol-extension-nightly'
 $packageSearch  = 'Kopano OL Extension'
 $installerType  = 'msi'
 $silentArgs     = '/qb'
-$version        = '1.5.218'
-$intvers        = '1.5-218'
+$version        = '1.5.239'
+$intvers        = '1.5-239'
 $url            = 'https://download.kopano.io/community/olextension:/KopanoOLExtension-' + $intvers + '-32bit.msi'
 $url64          = 'https://download.kopano.io/community/olextension:/KopanoOLExtension-' + $intvers + '-64bit.msi'
-$checksum       = 'B5F74283C016F3CB907D8A603D4D980F4F05E2B1'
+$checksum       = '4B2280751803859E47FC738F1D82A1C92C263C42'
 $checksumType   = 'sha1'
-$checksum64     = 'AB4DDC7BD795D1E544807AB1D313D55D6988E787'
+$checksum64     = 'AE4E083F83E78D7E045141ECE8E36DF9F0D18E55'
 $checksumType64 = $checksumType
 
 try {