diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..66fc428
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,24 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4ece384..194283a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -38,19 +38,26 @@ jobs:
     steps:
 
       - name: Checkout ${{ github.ref }} ( ${{ github.sha }} )
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
         with:
           persist-credentials: false
           submodules: false
 
       - name: Set up Ubuntu dependencies
         run: |
-            sudo apt install openjdk-11-jdk openjdk-17-jdk openjdk-21-jdk
+            sudo apt update
+            sudo apt install openjdk-17-jdk openjdk-21-jdk
+
+      - name: Set up latest JDK 25 from jdk.java.net
+        uses: oracle-actions/setup-java@b1546e588c27008e88bfcabda44d11c22316b9b8 # v1.4.2
+        with:
+            website: jdk.java.net
+            release: 25
 
       - name: Set up NetBeans
         run: |
-            wget -q 'https://archive.apache.org/dist/netbeans/netbeans/20/netbeans-20-bin.zip' -O /tmp/netbeans-20-bin.zip
-            (cd $HOME; unzip /tmp/netbeans-20-bin.zip)
+            wget -q 'https://archive.apache.org/dist/netbeans/netbeans/28/netbeans-28-bin.zip' -O /tmp/netbeans-28-bin.zip
+            (cd $HOME; unzip /tmp/netbeans-28-bin.zip)
 
       - name: Run RAT
         run: |
@@ -60,9 +67,9 @@ jobs:
 
       - name: Do build Jackpot
         run: |
-            export JDK11=/usr/lib/jvm/java-11-openjdk-amd64
             export JDK17=/usr/lib/jvm/java-17-openjdk-amd64
             export JDK21=/usr/lib/jvm/java-21-openjdk-amd64
-            export JAVA_HOME=$JDK11
+            export JDK25=$JAVA_HOME
+            export JAVA_HOME=$JDK17
             export PATH=$JAVA_HOME/bin:$PATH
-            (cd cmdline; ant -Dnbplatform.default.harness.dir=$HOME/netbeans/harness -DNETBEANS_PLATFORM=$HOME/netbeans -DJDK11=$JDK11 -DJDK17=$JDK17 -DJDK21=$JDK21 build-and-test)
+            (cd cmdline; ant -Dnbplatform.default.harness.dir=$HOME/netbeans/harness -DNETBEANS_PLATFORM=$HOME/netbeans -DJDK17=$JDK17 -DJDK21=$JDK21 -DJDK25=$JDK25 build-and-test)
diff --git a/cmdline/README.md b/cmdline/README.md
index 92918b8..651bdf8 100644
--- a/cmdline/README.md
+++ b/cmdline/README.md
@@ -27,22 +27,22 @@ This tool allows to run NetBeans Java code checker without the NetBeans IDE. Thi
 
 #### To Build
 
-* Apache NetBeans 20
-* JDK 11, JDK 17 and JDK 21
+* Apache NetBeans 28
+* JDK 17, JDK 21 and JDK 25
 * bash
 * Apache ant 1.9.9 or above
 * Apache Maven 3.3.9 or above
 
 #### To Run
 
-* JDK 11-21
+* JDK 17-25
 
 ### Building
 
 Build using:
 
 ```
-$ ant -DNETBEANS_PLATFORM=<path-to-NetBeans-20> -DJDK11=<path-to-JDK-11> -DJDK17=<path-to-JDK-17> -DJDK21=<path-to-JDK-21> build-and-test
+$ ant -DNETBEANS_PLATFORM=<path-to-NetBeans-28> -DJDK17=<path-to-JDK-17> -DJDK21=<path-to-JDK-21> -DJDK25=<path-to-JDK25> build-and-test
 ```
 
 The built product is in tool/build/jackpot.
diff --git a/cmdline/build.xml b/cmdline/build.xml
index 9c7b4dc..39300ea 100644
--- a/cmdline/build.xml
+++ b/cmdline/build.xml
@@ -52,7 +52,7 @@
     </target>
 
     <target name="build-and-test">
-        <property name="version" value="20.0" />
+        <property name="version" value="28.0" />
         <condition property="jackpot.root" value="${basedir}" else="${basedir}/..">
             <available file="${basedir}/LICENSE" />
         </condition>
@@ -66,21 +66,21 @@
         <ant dir="${basedir}" inheritAll="false" inheritRefs="false">
             <property name="nbplatform.default.harness.dir" value="${NETBEANS_PLATFORM}/harness" />
             <property name="nbplatform.default.netbeans.dest.dir" value="${NETBEANS_PLATFORM}" />
-            <property name="test.nbjdk.home" value="${JDK11}" />
+            <property name="test.nbjdk.home" value="${JDK17}" />
             <property name="jackpot.root" location="${jackpot.root}" />
             <target name="test" />
         </ant>
         <ant dir="${basedir}" inheritAll="false" inheritRefs="false">
             <property name="nbplatform.default.harness.dir" value="${NETBEANS_PLATFORM}/harness" />
             <property name="nbplatform.default.netbeans.dest.dir" value="${NETBEANS_PLATFORM}" />
-            <property name="test.nbjdk.home" value="${JDK17}" />
+            <property name="test.nbjdk.home" value="${JDK21}" />
             <property name="jackpot.root" location="${jackpot.root}" />
             <target name="test" />
         </ant>
         <ant dir="${basedir}" inheritAll="false" inheritRefs="false">
             <property name="nbplatform.default.harness.dir" value="${NETBEANS_PLATFORM}/harness" />
             <property name="nbplatform.default.netbeans.dest.dir" value="${NETBEANS_PLATFORM}" />
-            <property name="test.nbjdk.home" value="${JDK21}" />
+            <property name="test.nbjdk.home" value="${JDK25}" />
             <property name="jackpot.root" location="${jackpot.root}" />
             <target name="test" />
         </ant>
@@ -93,10 +93,6 @@
         <property environment="env"/>
         <exec executable="build/test/scripted/run" dir="tool" failonerror="true">
         </exec>
-        <exec executable="build/test/scripted/run" dir="tool" failonerror="true">
-            <env key="JAVA_HOME" path="${JDK11}" />
-            <env key="PATH" path="${JDK11}/bin:${env.PATH}" />
-        </exec>
         <exec executable="build/test/scripted/run" dir="tool" failonerror="true">
             <env key="JAVA_HOME" path="${JDK17}" />
             <env key="PATH" path="${JDK17}/bin:${env.PATH}" />
@@ -105,6 +101,10 @@
             <env key="JAVA_HOME" path="${JDK21}" />
             <env key="PATH" path="${JDK21}/bin:${env.PATH}" />
         </exec>
+        <exec executable="build/test/scripted/run" dir="tool" failonerror="true">
+            <env key="JAVA_HOME" path="${JDK25}" />
+            <env key="PATH" path="${JDK25}/bin:${env.PATH}" />
+        </exec>
         <echo>Installing tool to the local maven repository:</echo>
         <exec dir="." executable="mvn" failonerror="true">
             <arg line="install:install-file -Dfile=tool/build/jackpot/jackpot.jar -DgroupId=org.apache.netbeans.modules.jackpot30 -DartifactId=tool -Dversion=${version} -Dpackaging=jar -DpomFile=tool/scripts/pom.xml" />
diff --git a/cmdline/lib/nbproject/project.properties b/cmdline/lib/nbproject/project.properties
index 3ff4e3b..b504c98 100644
--- a/cmdline/lib/nbproject/project.properties
+++ b/cmdline/lib/nbproject/project.properties
@@ -14,6 +14,6 @@
 # limitations under the License.
 
 is.autoload=true
-javac.source=1.8
+javac.release=17
 javac.compilerargs=-Xlint -Xlint:-serial
 spec.version.base=1.16.0
diff --git a/cmdline/maven/pom.xml b/cmdline/maven/pom.xml
index 3e5d543..65e9f12 100644
--- a/cmdline/maven/pom.xml
+++ b/cmdline/maven/pom.xml
@@ -21,7 +21,7 @@
 
   <groupId>org.apache.netbeans.modules.jackpot30</groupId>
   <artifactId>jackpot30-maven-plugin</artifactId>
-  <version>20.0</version>
+  <version>28.0</version>
   <packaging>maven-plugin</packaging>
 
   <name>Jackpot 3.0 Command Line Tool Maven Bridge</name>
diff --git a/cmdline/maven/src/test/java/org/netbeans/modules/jackpot30/maven/RunJackpot30Test.java b/cmdline/maven/src/test/java/org/netbeans/modules/jackpot30/maven/RunJackpot30Test.java
index 306007a..982a09b 100644
--- a/cmdline/maven/src/test/java/org/netbeans/modules/jackpot30/maven/RunJackpot30Test.java
+++ b/cmdline/maven/src/test/java/org/netbeans/modules/jackpot30/maven/RunJackpot30Test.java
@@ -67,7 +67,7 @@ protected void runTest() throws Throwable {
 
         Process p = Runtime.getRuntime().exec(new String[] {
             maven,
-            "-Djackpot.plugin.version=20.0",
+            "-Djackpot.plugin.version=28.0",
             "-q",
             "--batch-mode",
             "jackpot30:analyze"
diff --git a/cmdline/maven/tests/fail-on-warnings/golden b/cmdline/maven/tests/fail-on-warnings/golden
index e78523f..8aabcf1 100644
--- a/cmdline/maven/tests/fail-on-warnings/golden
+++ b/cmdline/maven/tests/fail-on-warnings/golden
@@ -1,7 +1,7 @@
 ${basedir}/src/main/java/test/App.java:24: warning: [Convert_to_Lambda_or_Member_Reference] This anonymous inner class creation can be turned into a lambda expression.
         Runnable r = new Runnable() { public void run() { } };
                          ^
-[ERROR] Failed to execute goal org.apache.netbeans.modules.jackpot30:jackpot30-maven-plugin:20.0:analyze (default-cli) on project maven-test: jackpo30 failed. -> [Help 1]
+[ERROR] Failed to execute goal org.apache.netbeans.modules.jackpot30:jackpot30-maven-plugin:28.0:analyze (default-cli) on project maven-test: jackpo30 failed. -> [Help 1]
 [ERROR] 
 [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
 [ERROR] Re-run Maven using the -X switch to enable full debug logging.
diff --git a/cmdline/maven/tests/sl-failure/golden b/cmdline/maven/tests/sl-failure/golden
index 6a4560d..2841e4f 100644
--- a/cmdline/maven/tests/sl-failure/golden
+++ b/cmdline/maven/tests/sl-failure/golden
@@ -1,5 +1,5 @@
 unrecognized source level specification: unparseable
-[ERROR] Failed to execute goal org.apache.netbeans.modules.jackpot30:jackpot30-maven-plugin:20.0:analyze (default-cli) on project maven-test: jackpo30 failed. -> [Help 1]
+[ERROR] Failed to execute goal org.apache.netbeans.modules.jackpot30:jackpot30-maven-plugin:28.0:analyze (default-cli) on project maven-test: jackpo30 failed. -> [Help 1]
 [ERROR] 
 [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
 [ERROR] Re-run Maven using the -X switch to enable full debug logging.
diff --git a/cmdline/tool/nbproject/project.properties b/cmdline/tool/nbproject/project.properties
index ae1c338..ba027c6 100644
--- a/cmdline/tool/nbproject/project.properties
+++ b/cmdline/tool/nbproject/project.properties
@@ -13,8 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-javac.source=11
-javac.target=11
+javac.release=17
 javac.compilerargs=-Xlint -Xlint:-serial
 cp.extra=build/jopt-simple-3.2.jar:build/diffparser-1.4.jar:build/slf4j-api-1.7.25.jar:build/slf4j-nop-1.7.25.jar:${tools.jar}
 spec.version.base=1.16.0