diff --git a/configure.ac b/configure.ac
index f8848e3a..cf1ff2b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 m4_pattern_allow([PKG_CHECK_EXISTS])
 
-AC_INIT([rtorrent],[0.15.5],[sundell.software@gmail.com])
+AC_INIT([rtorrent],[0.15.6],[sundell.software@gmail.com])
 
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIRS([scripts])
@@ -10,7 +10,7 @@ AM_PROG_AR
 LT_INIT
 
 AC_PROG_CXX
-AC_DEFINE([API_VERSION], [14], [api version])
+AC_DEFINE([API_VERSION], [15], [api version])
 
 # Filter out unwanted flags added by autoconf on some systems, e.g. MacOS.
 TORRENT_REMOVE_UNWANTED(CXX, $CXX, -std=c++11 -std=gnu++11)
@@ -54,7 +54,7 @@ fi
 
 PKG_CHECK_MODULES([LIBCURL], [libcurl],, [LIBCURL_CHECK_CONFIG])
 PKG_CHECK_MODULES([CPPUNIT], [cppunit],, [no_cppunit="yes"])
-PKG_CHECK_MODULES([DEPENDENCIES], [libtorrent >= 0.15.5])
+PKG_CHECK_MODULES([DEPENDENCIES], [libtorrent >= 0.15.6])
 
 AC_LANG_PUSH(C++)
 TORRENT_WITH_XMLRPC_C