diff --git a/NEWS b/NEWS
index 9d7a431..c54d3c8 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,8 @@
 Copyright (C) 2014 Tim Ruehsen
 
+30.05.2014
+  * Fixed psl_builtin() to return NULL if no built-in PSL data is available
+
 27.05.2014  Release V0.2.3
   * changed API version to 0.2
 
diff --git a/configure.ac b/configure.ac
index 8615f71..e87579b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 
-AC_INIT([libpsl], [0.2.3], [tim.ruehsen@gmx.de], [libpsl], [http://github.com/rockdaboot/libpsl])
+AC_INIT([libpsl], [0.2.4], [tim.ruehsen@gmx.de], [libpsl], [http://github.com/rockdaboot/libpsl])
 AC_PREREQ([2.59])
 AM_INIT_AUTOMAKE([1.10 -Wall no-define])
 
@@ -63,7 +63,7 @@ AS_IF([ test "$enable_man" != no ], [
 # 4. If any interfaces have been added, removed, or changed since the last update, increment current, and set revision to 0.
 # 5. If any interfaces have been added since the last public release, then increment age.
 # 6. If any interfaces have been removed or changed since the last public release, then set age to 0. 
-AC_SUBST([LIBPSL_SO_VERSION], [0:3:0])
+AC_SUBST([LIBPSL_SO_VERSION], [0:4:0])
 AC_SUBST([LIBPSL_API_VERSION], [0.2])
 
 # Check for idn2