diff --git a/configure.ac b/configure.ac
index 011af6bd1..78d63f927 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 0)
-define(_CLIENT_VERSION_MINOR, 12)
+define(_CLIENT_VERSION_MINOR, 13)
 define(_CLIENT_VERSION_REVISION, 99)
 define(_CLIENT_VERSION_BUILD, 0)
 define(_CLIENT_VERSION_IS_RELEASE, false)
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 428fba98e..22850db83 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -34,7 +34,7 @@ PROJECT_NAME           = Bitcoin
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.12.99
+PROJECT_NUMBER         = 0.13.99
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description 
 # for a project that appears at the top of each page and should give viewer 
diff --git a/doc/README.md b/doc/README.md
index c30f29452..09a507c9c 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -1,4 +1,4 @@
-Bitcoin Core 0.12.99
+Bitcoin Core 0.13.99
 =====================
 
 Setup
diff --git a/doc/README_windows.txt b/doc/README_windows.txt
index 2d1c4503c..74a05138a 100644
--- a/doc/README_windows.txt
+++ b/doc/README_windows.txt
@@ -1,4 +1,4 @@
-Bitcoin Core 0.12.99
+Bitcoin Core 0.13.99
 =====================
 
 Intro
diff --git a/src/clientversion.h b/src/clientversion.h
index 47263d534..53ad46034 100644
--- a/src/clientversion.h
+++ b/src/clientversion.h
@@ -15,7 +15,7 @@
 
 //! These need to be macros, as clientversion.cpp's and bitcoin*-res.rc's voodoo requires it
 #define CLIENT_VERSION_MAJOR 0
-#define CLIENT_VERSION_MINOR 12
+#define CLIENT_VERSION_MINOR 13
 #define CLIENT_VERSION_REVISION 99
 #define CLIENT_VERSION_BUILD 0