diff --git a/changelog b/changelog
index 21ec8a74843..3fb25b73613 100644
--- a/changelog
+++ b/changelog
@@ -1,4 +1,4 @@
-Version 1.8.0+svn:
+Version 1.9.0-svn:
  * Campaigns:
    * Northern Rebirth:
      * In Showdown, you recover full gold only if Sisal survived the previous
diff --git a/configure.ac b/configure.ac
index 00a38b79f38..b268c5e4d56 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@
 
 AC_PREREQ([2.60])
 
-define([WESNOTH_VERSION],[1.8.0+svn])
+define([WESNOTH_VERSION],[1.9.0-svn])
 define([WESNOTH_BUGS],[http://bugs.wesnoth.org])
 
 AC_INIT([Battle for Wesnoth], WESNOTH_VERSION, WESNOTH_BUGS, [wesnoth])
diff --git a/players_changelog b/players_changelog
index 19646b8cecf..8a95db44d23 100644
--- a/players_changelog
+++ b/players_changelog
@@ -2,7 +2,7 @@ This is meant to be a concise list of player-visible changes (very minor
 changes may be omitted). For a complete list of changes, see the main
 changelog: http://svn.gna.org/viewcvs/*checkout*/wesnoth/trunk/changelog
 
-Version 1.8.0+svn:
+Version 1.9.0-svn:
  * Campaigns:
    * Northern Rebirth:
      * In Showdown, you recover full gold only if Sisal survived the previous
diff --git a/src/wesconfig.h b/src/wesconfig.h
index d11e329c439..4aec3de33e9 100644
--- a/src/wesconfig.h
+++ b/src/wesconfig.h
@@ -23,7 +23,7 @@
 #ifdef VERSION
   #undef VERSION
 #endif
-#define VERSION "1.8.0+svn"
+#define VERSION "1.9.0-svn"
 #ifndef PACKAGE
 #define PACKAGE "wesnoth"
 #endif