diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 6270953..f8f62de 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -70,10 +70,10 @@ jobs:
     #   make bootstrap
     #   make release
     - uses: actions/checkout@v2
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v2
       with:
-        java-version: '17'
+        java-version: '21'
         distribution: 'temurin'
     - name: Cache Maven packages
       uses: actions/cache@v2
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index b00ac8e..9572cf2 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -20,10 +20,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v2
       with:
-        java-version: '17'
+        java-version: '21'
         distribution: 'temurin'
     - uses: actions/cache@v1
       with:
diff --git a/pom.xml b/pom.xml
index 3998368..2fc2c8f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>fess-suggest</artifactId>
-	<version>14.18.0-SNAPSHOT</version>
+	<version>15.0.0-SNAPSHOT</version>
 	<packaging>jar</packaging>
 	<name>fess-suggest</name>
 	<scm>
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.codelibs.fess</groupId>
 		<artifactId>fess-parent</artifactId>
-		<version>14.18.0-SNAPSHOT</version>
+		<version>15.0.0-SNAPSHOT</version>
 		<relativePath />
 	</parent>
 	<build>