diff --git a/lib/cppcheck.cpp b/lib/cppcheck.cpp
index 85a116c27..e42aa1117 100644
--- a/lib/cppcheck.cpp
+++ b/lib/cppcheck.cpp
@@ -34,7 +34,7 @@
 #include <pcre.h>
 #endif
 
-static const char Version[] = "1.57";
+static const char Version[] = "1.58 dev";
 static const char ExtraVersion[] = "";
 
 static TimerResults S_timerResults;
diff --git a/lib/version.h b/lib/version.h
index f51694f15..da9127360 100644
--- a/lib/version.h
+++ b/lib/version.h
@@ -1,3 +1,3 @@
-#define CPPCHECK_VERSION_STRING "1.57"
-#define CPPCHECK_VERSION 1,57,0,0
+#define CPPCHECK_VERSION_STRING "1.58 dev"
+#define CPPCHECK_VERSION 1,57,99,0
 #define LEGALCOPYRIGHT L"Copyright (C) 2007-2012 Daniel Marjam\x00E4ki and Cppcheck team."
diff --git a/man/manual.docbook b/man/manual.docbook
index 53b00c4e3..f80b3c226 100644
--- a/man/manual.docbook
+++ b/man/manual.docbook
@@ -3,7 +3,7 @@
 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
 <book>
   <bookinfo>
-    <title>Cppcheck 1.57</title>
+    <title>Cppcheck 1.58 dev</title>
 
     <date>2012-04-08</date>
   </bookinfo>
diff --git a/win_installer/productInfo.wxi b/win_installer/productInfo.wxi
index 5e5a306ed..04d47b244 100644
--- a/win_installer/productInfo.wxi
+++ b/win_installer/productInfo.wxi
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Include>
-  <?define ProductName = "Cppcheck 1.57" ?>
+  <?define ProductName = "Cppcheck 1.58 dev" ?>
   <?define ProductNameShort = "Cppcheck" ?>
-  <?define ProductVersion = "1.57" ?>
+  <?define ProductVersion = "1.57.99" ?>
 
   <?define ProductManufacturer = "The Cppcheck team" ?>
   <?define ProductDescription = "Cppcheck is a tool for static analysis of C/C++ code" ?>