diff --git a/ChangeLog b/ChangeLog
index df99786821cab58fc9f34d7e8b93dff83ec6aca4..33bf6093f1d1fccaf489932eaf4c9d9a6df373ae 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2012-08-17: Version 0.5.0
+ - Support for Mac OS X using IOKit
+ - Fix AACS detection failure in some Win32 systems
+
 2012-05-07: Version 0.4.0
  - Added aacs_open2() and error codes
  - Renamed libaacs_test to aacs_info
diff --git a/configure.ac b/configure.ac
index 2a30513efd7e01b07dce50911a3bd49a0e82d840..ab1e62244f3833d52e5f316f42884082a6ac12c8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 # library version number
 m4_define([aacs_major], 0)
-m4_define([aacs_minor], 4)
+m4_define([aacs_minor], 5)
 m4_define([aacs_micro], 0)
 m4_define([aacs_version],[aacs_major.aacs_minor.aacs_micro])
 
@@ -16,7 +16,7 @@ m4_define([aacs_version],[aacs_major.aacs_minor.aacs_micro])
 #
 m4_define([lt_current],  2)
 m4_define([lt_age],      2)
-m4_define([lt_revision], 0)
+m4_define([lt_revision], 1)
 
 # initilization
 AC_INIT([libaacs], aacs_version, [http://www.videolan.org/developers/libaacs.html])