diff --git a/cli/main.cpp b/cli/main.cpp
index dd133d392..3fb01ce61 100644
--- a/cli/main.cpp
+++ b/cli/main.cpp
@@ -20,7 +20,7 @@
 /**
  *
  * @mainpage Cppcheck
- * @version 1.65
+ * @version 1.65.99
  *
  * @section overview_sec Overview
  * Cppcheck is a simple tool for static analysis of C/C++ code.
diff --git a/lib/version.h b/lib/version.h
index f9d3413d8..9e46c7746 100644
--- a/lib/version.h
+++ b/lib/version.h
@@ -1,3 +1,3 @@
-#define CPPCHECK_VERSION_STRING "1.65"
-#define CPPCHECK_VERSION 1,65,0,0
+#define CPPCHECK_VERSION_STRING "1.66 dev"
+#define CPPCHECK_VERSION 1,65,99,0
 #define LEGALCOPYRIGHT L"Copyright (C) 2007-2014 Daniel Marjam\x00E4ki and Cppcheck team."
diff --git a/man/manual.docbook b/man/manual.docbook
index c372fcdf9..05e8061ab 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 1.65</title>
+    <title>Cppcheck 1.66 dev</title>
 
     <date>2013-12-23</date>
   </bookinfo>
diff --git a/win_installer/productInfo.wxi b/win_installer/productInfo.wxi
index e6161b0cc..d9fbd64de 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 1.65" ?>
+  <?define ProductName = "Cppcheck 1.66 dev" ?>
   <?define ProductNameShort = "Cppcheck" ?>
-  <?define ProductVersion = "1.65" ?>
+  <?define ProductVersion = "1.65.99" ?>
 
   <?define ProductManufacturer = "The Cppcheck team" ?>
   <?define ProductDescription = "Cppcheck is a tool for static analysis of C/C++ code" ?>