diff --git a/pom.xml b/pom.xml
index 3afdbf001033214a5780cb391bd2ec40312fb029..f14ca78b221d58733fc0fd0742cea88a57a084e2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.codelibs.fess</groupId>
 	<artifactId>fess</artifactId>
-	<version>11.3.1-SNAPSHOT</version>
+	<version>12.0.0-SNAPSHOT</version>
 	<packaging>war</packaging>
 	<name>Fess</name>
 	<description>Fess is Full tExt Search System.</description>
diff --git a/src/main/java/org/codelibs/fess/Constants.java b/src/main/java/org/codelibs/fess/Constants.java
index bb87a9031db1b4582b2c5fc098b525cb65d9aa1d..95ecb1e9709c4267296311d0963d664d7d206ebc 100644
--- a/src/main/java/org/codelibs/fess/Constants.java
+++ b/src/main/java/org/codelibs/fess/Constants.java
@@ -22,9 +22,9 @@ import org.codelibs.core.CoreLibConstants;
 import org.codelibs.core.lang.StringUtil;
 
 public class Constants extends CoreLibConstants {
-    public static final int MAJOR_VERSION = 11;
+    public static final int MAJOR_VERSION = 12;
 
-    public static final int MINOR_VERSION = 3;
+    public static final int MINOR_VERSION = 0;
 
     public static final String FESS_VERSION = String.valueOf(MAJOR_VERSION) + "." + String.valueOf(MINOR_VERSION);