diff --git a/configure.ac b/configure.ac
index a9622e5..8a5ed10 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([phylonium], [1.4], [kloetzl@volbio.mpg.de])
+AC_INIT([phylonium], [1.5], [kloetzl@volbio.mpg.de])
 AC_CONFIG_SRCDIR([src/phylonium.cxx])
 AM_INIT_AUTOMAKE([-Wall foreign ])
 AC_CONFIG_MACRO_DIR([m4])