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 2520eb8..ee9299b 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>2.0.280</version>
+        <version>2.0.285</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 2.0.280 (17-01-2018)</releaseNotes>
+        <releaseNotes>upgrade to 2.0.285 (05-02-2018)</releaseNotes>
         <copyright>2018 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 5cf63f9..30e83a4 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        = '2.0.280'
-$intvers        = '2.0-280'
+$version        = '2.0.285'
+$intvers        = '2.0-285'
 $url            = 'https://download.kopano.io/community/olextension:/KopanoOLExtension-' + $intvers + '-32bit.msi'
 $url64          = 'https://download.kopano.io/community/olextension:/KopanoOLExtension-' + $intvers + '-64bit.msi'
-$checksum       = 'd617d9669792c8c26867b1f06b0d09efac3edd0b'
+$checksum       = 'AE6C1D95C7CC201698EBEE2A0EB364A62CB81B26'
 $checksumType   = 'sha1'
-$checksum64     = '586cf8d64148e33f8b2e25f5b922479a720fcf77'
+$checksum64     = 'EF5BF4092E08FC6A74DEBFF5562E45A99AC329B1'
 $checksumType64 = $checksumType
 
 try {