diff --git a/build_client.sh b/build_client.sh
index 124e18d77..981e43edd 100755
--- a/build_client.sh
+++ b/build_client.sh
@@ -4,9 +4,9 @@
 # download maven from :
 #   https://maven.apache.org
 
-if [ ! -z "${JAVA_11_HOME}" ]; then
-	echo JAVA_11_HOME: ${JAVA_11_HOME}
-	JAVA_HOME=${JAVA_11_HOME}
+if [ ! -z "${JAVA_21_HOME}" ]; then
+	echo JAVA_21_HOME: ${JAVA_21_HOME}
+	JAVA_HOME=${JAVA_21_HOME}
 fi
 
 MVN="`which mvn`"
diff --git a/pom.xml b/pom.xml
index 0bc5d6cea..cb09772fb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>io.github.scouter-project</groupId>
     <artifactId>scouter-parent</artifactId>
-    <version>2.20.0</version> <!--scouter-->
+    <version>2.21.1</version> <!--scouter-->
     <packaging>pom</packaging>
 
     <name>SCOUTER APM</name>
diff --git a/scouter.agent.batch/pom.xml b/scouter.agent.batch/pom.xml
index 3482a28e6..b4a9fffab 100644
--- a/scouter.agent.batch/pom.xml
+++ b/scouter.agent.batch/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-agent-batch</artifactId>
diff --git a/scouter.agent.host/pom.xml b/scouter.agent.host/pom.xml
index 7241b53b3..0e80321fc 100644
--- a/scouter.agent.host/pom.xml
+++ b/scouter.agent.host/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-agent-host</artifactId>
diff --git a/scouter.agent.java/pom.xml b/scouter.agent.java/pom.xml
index 37cfc9c41..9d8f14455 100644
--- a/scouter.agent.java/pom.xml
+++ b/scouter.agent.java/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-agent-java</artifactId>
diff --git a/scouter.client.build/pom.xml b/scouter.client.build/pom.xml
index 90b1006d9..829b8d0f3 100644
--- a/scouter.client.build/pom.xml
+++ b/scouter.client.build/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" 
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    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>
 	<groupId>scouter.client</groupId>
@@ -13,15 +13,15 @@
 		<module>../scouter.client.product</module>
 	</modules>
 	<properties>
-		<tycho-version>2.7.0</tycho-version>
+		<tycho-version>5.0.1</tycho-version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 	</properties>
 	<repositories>
-	        <repository>
-	        	<id>eclipse-simultaneous-2022-03</id>
-	        	<layout>p2</layout>
-        		<url>https://download.eclipse.org/releases/2022-03/</url>
-	        </repository>
+		<repository>
+			<id>eclipse-2025-12</id>
+			<layout>p2</layout>
+			<url>https://download.eclipse.org/releases/2025-12/</url>
+		</repository>
 	</repositories>
 
 	<build>
diff --git a/scouter.client.feature/feature.xml b/scouter.client.feature/feature.xml
index 366100806..d32e4e82d 100644
--- a/scouter.client.feature/feature.xml
+++ b/scouter.client.feature/feature.xml
@@ -20,13 +20,6 @@
       [Enter License Description here.]
    </license>
 
-   <plugin
-         id="javax.servlet"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
-
    <plugin
          id="org.eclipse.compare.core"
          download-size="0"
diff --git a/scouter.client.product/scouter.client.product b/scouter.client.product/scouter.client.product
index ab1e03d52..a5f4eabde 100644
--- a/scouter.client.product/scouter.client.product
+++ b/scouter.client.product/scouter.client.product
@@ -26,7 +26,7 @@
       <vmArgs>-Xms128m
 -Xmx1024m
 -XX:+UseG1GC
--Dosgi.requiredJavaVersion=11
+-Dosgi.requiredJavaVersion=21
       </vmArgs>
       <vmArgsMac>-XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts
       </vmArgsMac>
@@ -52,10 +52,16 @@
    </vm>
 
    <plugins>
+      <plugin id="org.eclipse.equinox.launcher"/>
+      <plugin id="org.eclipse.equinox.launcher.cocoa.macosx.x86_64" fragment="true"/>
+      <plugin id="org.eclipse.equinox.launcher.cocoa.macosx.aarch64" fragment="true"/>
+      <plugin id="org.eclipse.equinox.launcher.gtk.linux.x86_64" fragment="true"/>
+      <plugin id="org.eclipse.equinox.launcher.win32.win32.x86_64" fragment="true"/>
    </plugins>
 
    <features>
-      <feature id="org.eclipse.rcp"/>
+      <feature id="org.eclipse.platform"/>
+      <feature id="org.eclipse.equinox.executable"/>
       <feature id="scouter.client.feature"/>
       <feature id="org.eclipse.emf.ecore"/>
       <feature id="org.eclipse.emf.common"/>
diff --git a/scouter.client/META-INF/MANIFEST.MF b/scouter.client/META-INF/MANIFEST.MF
index e4f754910..5eb892093 100644
--- a/scouter.client/META-INF/MANIFEST.MF
+++ b/scouter.client/META-INF/MANIFEST.MF
@@ -25,7 +25,7 @@ Require-Bundle:
  org.eclipse.swt,
  org.eclipse.e4.core.commands,
  org.eclipse.e4.ui.services
-Bundle-RequiredExecutionEnvironment: JavaSE-11
+Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: .,
  lib/scouter.common.jar,
diff --git a/scouter.client/pom.xml b/scouter.client/pom.xml
index d099e3977..5627e719d 100644
--- a/scouter.client/pom.xml
+++ b/scouter.client/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" 
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    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>
 
@@ -20,8 +20,8 @@
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-compiler-plugin</artifactId>
             <configuration>
-                <source>11</source>
-                <target>11</target>
+                <source>21</source>
+                <target>21</target>
             </configuration>
         </plugin>
     </plugins>
diff --git a/scouter.common/pom.xml b/scouter.common/pom.xml
index 117dd4012..3095c8b6e 100644
--- a/scouter.common/pom.xml
+++ b/scouter.common/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-common</artifactId>
diff --git a/scouter.deploy/pom.xml b/scouter.deploy/pom.xml
index 2e3b3a307..af080a083 100644
--- a/scouter.deploy/pom.xml
+++ b/scouter.deploy/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-deploy</artifactId>
diff --git a/scouter.extra.java20/pom.xml b/scouter.extra.java20/pom.xml
index 2085893ca..ed326c6aa 100644
--- a/scouter.extra.java20/pom.xml
+++ b/scouter.extra.java20/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/scouter.server.boot/pom.xml b/scouter.server.boot/pom.xml
index 8aae8184c..5462f8662 100644
--- a/scouter.server.boot/pom.xml
+++ b/scouter.server.boot/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-server-boot</artifactId>
diff --git a/scouter.server/pom.xml b/scouter.server/pom.xml
index 7d5865b65..2721b5aef 100644
--- a/scouter.server/pom.xml
+++ b/scouter.server/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-server</artifactId>
diff --git a/scouter.weaver/pom.xml b/scouter.weaver/pom.xml
index 76799cc3f..3bb36b9c0 100644
--- a/scouter.weaver/pom.xml
+++ b/scouter.weaver/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/scouter.webapp/pom.xml b/scouter.webapp/pom.xml
index e4474e9ec..39c9000e5 100644
--- a/scouter.webapp/pom.xml
+++ b/scouter.webapp/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
     <modelVersion>4.0.0</modelVersion>