diff --git a/ChangeLog b/ChangeLog
index 9ca3382b..1e5ab543 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -46,6 +46,8 @@ ver. 0.8.12 (2013/12/XX) - things-can-only-get-better
   - exim-spam filter to match spamassassin log entry for option SAdevnull.
     Thanks Ivo Truxa. Closes gh-533
   - Added filter.d/openwebmail filter thanks Ivo Truxa. Closes gh-543
+  - Added filter.d/groupoffice filter thanks to logs from Merijn Schering.
+    Closes gh-566
   - Added to sshd filter expression for "Received disconnect from <HOST>: 3:
     ...: Auth fail". Thanks Marcel Dopita. Closes gh-289
 
diff --git a/THANKS b/THANKS
index 04aa1f20..efbcbe75 100644
--- a/THANKS
+++ b/THANKS
@@ -61,6 +61,7 @@ Markus Hoffmann
 Marvin Rouge
 mEDI
 Мернов Георгий
+Merijn Schering
 Michael C. Haller
 Michael Hanselmann
 Nick Munger