diff --git a/README.md b/README.md
index 6ba48cda..b7884c47 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 
-# CorvusSKK ver. 2.3.4
+# CorvusSKK ver. 2.4.0
 
 Windowsで動作するSKK風のIMEです。
 
diff --git a/common/version.h b/common/version.h
index b200a85d..cc8e66cb 100644
--- a/common/version.h
+++ b/common/version.h
@@ -9,12 +9,12 @@
 #define TEXTSERVICE_DESC	TEXTSERVICE_NAME L"_DEBUG"
 #endif
 #define TEXTSERVICE_DIR		L"IMCRVSKK"
-#define TEXTSERVICE_VER		L"2.3.4"
+#define TEXTSERVICE_VER		L"2.4.0"
 
 //for resource
 #define RC_AUTHOR			"nathancorvussolis"
 #define RC_PRODUCT			"CorvusSKK"
-#define RC_VERSION			"2.3.4"
-#define RC_VERSION_D		2,3,4,0
+#define RC_VERSION			"2.4.0"
+#define RC_VERSION_D		2,4,0,0
 
 #endif
diff --git a/installer/_version.cmd b/installer/_version.cmd
index 3c05869e..e75a6c13 100644
--- a/installer/_version.cmd
+++ b/installer/_version.cmd
@@ -1,4 +1,4 @@
 
-set VERSION=2.3.4
+set VERSION=2.4.0
 
 set TARGETDIR=build
diff --git a/installer/installer-version.wxi b/installer/installer-version.wxi
index 5479f1c8..ae90210e 100644
--- a/installer/installer-version.wxi
+++ b/installer/installer-version.wxi
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Include>
-  <?define version="2.3.4" ?>
+  <?define version="2.4.0" ?>
 </Include>