diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3c037a10b36..b5857a8413a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.22)
-project(Cppcheck VERSION 2.20.99 LANGUAGES CXX)
+project(Cppcheck VERSION 2.21.99 LANGUAGES CXX)
 
 include(cmake/options.cmake)
 
diff --git a/cli/main.cpp b/cli/main.cpp
index 9bea4336c84..d1a635e1f6f 100644
--- a/cli/main.cpp
+++ b/cli/main.cpp
@@ -20,7 +20,7 @@
 /**
  *
  * @mainpage Cppcheck
- * @version 2.20.99
+ * @version 2.21.99
  *
  * @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 2a64885ffa8..6d25dd4c158 100644
--- a/lib/version.h
+++ b/lib/version.h
@@ -20,8 +20,8 @@
 #ifndef versionH
 #define versionH
 
-#define CPPCHECK_VERSION_STRING "2.21 dev"
-#define CPPCHECK_VERSION 2,20,99,0
+#define CPPCHECK_VERSION_STRING "2.22 dev"
+#define CPPCHECK_VERSION 2,21,99,0
 
 #define LEGALCOPYRIGHT L"Copyright (C) 2007-2026 Cppcheck team."
 
diff --git a/man/manual.md b/man/manual.md
index 8d8d5b22350..47a3a43fd36 100644
--- a/man/manual.md
+++ b/man/manual.md
@@ -1,6 +1,6 @@
 ---
 title: Cppcheck manual
-subtitle: Version 2.21 dev
+subtitle: Version 2.22 dev
 author: Cppcheck team
 lang: en
 documentclass: report
diff --git a/man/reference-cfg-format.md b/man/reference-cfg-format.md
index 3067d0a8f2c..f426057ab47 100644
--- a/man/reference-cfg-format.md
+++ b/man/reference-cfg-format.md
@@ -1,6 +1,6 @@
 ---
 title: Cppcheck .cfg format
-subtitle: Version 2.21 dev
+subtitle: Version 2.22 dev
 author: Cppcheck team
 lang: en
 documentclass: report
diff --git a/man/writing-addons.md b/man/writing-addons.md
index e593c2e9cce..2627671fa87 100644
--- a/man/writing-addons.md
+++ b/man/writing-addons.md
@@ -1,6 +1,6 @@
 ---
 title: Writing addons
-subtitle: Version 2.21 dev
+subtitle: Version 2.22 dev
 author: Cppcheck team
 lang: en
 documentclass: report
diff --git a/win_installer/productInfo.wxi b/win_installer/productInfo.wxi
index f89e956dbb8..85e73ea3ca2 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 $(var.Platform) 2.21 dev" ?>
+  <?define ProductName = "Cppcheck $(var.Platform) 2.22 dev" ?>
   <?define ProductNameShort = "Cppcheck" ?>
-  <?define ProductVersion = "2.20.99" ?>
+  <?define ProductVersion = "2.21.99" ?>
 
   <?define ProductManufacturer = "The Cppcheck team" ?>
   <?define ProductDescription = "Cppcheck is a tool for static analysis of C/C++ code" ?>