diff --git a/ChangeLog b/ChangeLog
index f9223d7..fe32059 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,8 +1,9 @@
-2015-08-30  Juergen Knoedlseder  <jurgen.knodlseder@irap.omp.eu>
+2015-10-02  Juergen Knoedlseder  <jurgen.knodlseder@irap.omp.eu>
 
         * Version 0.11.0 released
         =========================
 
+        Add GCTAModelAeffBackground class
         Remove small angle approximation from GModelSpatialRadialShell
         Rename GSkymap to GSkyMap
         Add binary operators to GSkymap class
diff --git a/NEWS b/NEWS
index bd13ffc..4b950f3 100644
--- a/NEWS
+++ b/NEWS
@@ -2,7 +2,7 @@ New Features and Important Changes in GammaLib 0.11.0
 
 Author(s) : Juergen Knoedlseder
 
-30 August 2015
+2 October 2015
 
 
 1. Introduction
@@ -167,6 +167,11 @@ The deadtime correction has been removed from GCTAModelCubeBackground as the
 background cube rates are already given per livetime. We formerly did the
 correction twice (#1503).
 
+The GCTAModelAeffBackground class has been added to generate a background model
+from the effective area information (#1525). The usage of this model is similar
+to that of the IRF background model. The model type in the XML file is
+"CTAAeffBackground".
+
 
 21. COMPTEL interface
 ---------------------
diff --git a/README b/README
index 9e179c3..b18cc8c 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
 GammaLib information
 ====================
-Version: 0.10.0 (20 May 2015)
+Version: 0.11.0 (2 October 2015)
 Author:  Juergen Knoedlseder (jurgen.knodlseder@irap.omp.eu)