diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 0463d3e4..6f8d105d 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [ '11' ]
+        java: [ '21', '25' ]
         os: [ 'ubuntu-24.04' ]
     name: Build (Java ${{ matrix.java }}, ${{ matrix.os }})
     runs-on: ${{ matrix.os }}
@@ -67,7 +67,7 @@ jobs:
           path: build.log
 
       - name: Upload SAT Summary Report
-        if: ${{ always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) }}
+        if: ${{ always() && ((steps.build.outcome == 'success') || (steps.build.outcome == 'failure')) && (matrix.java == '21') }}
         uses: actions/upload-artifact@v6
         with:
           name: sat-summary-report
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index c89b435c..2b79229b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,11 +10,11 @@ on:
   workflow_dispatch:
     inputs:
       release_version:
-        description: 'Release version (e.g., 0.18.0)'
+        description: 'Release version (e.g., 1.0.0)'
         required: true
         type: string
       next_snapshot_version:
-        description: 'Next snapshot version (e.g., 0.19.0-SNAPSHOT)'
+        description: 'Next snapshot version (e.g., 1.1.0-SNAPSHOT)'
         required: true
         type: string
 
@@ -30,10 +30,10 @@ jobs:
         token: ${{ secrets.GITHUB_TOKEN }}
         fetch-depth: 0
     
-    - name: Set up JDK 11
+    - name: Set up JDK 21
       uses: actions/setup-java@v5
       with:
-        java-version: 11
+        java-version: 21
         distribution: 'temurin'
         cache: maven
         server-id: maven
diff --git a/codestyle/pom.xml b/codestyle/pom.xml
index cea510fd..c63c6203 100644
--- a/codestyle/pom.xml
+++ b/codestyle/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <groupId>org.openhab.tools</groupId>
diff --git a/custom-checks/checkstyle/pom.xml b/custom-checks/checkstyle/pom.xml
index c5de0515..e0082d04 100644
--- a/custom-checks/checkstyle/pom.xml
+++ b/custom-checks/checkstyle/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat.custom-checks</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>checkstyle</artifactId>
diff --git a/custom-checks/findbugs/pom.xml b/custom-checks/findbugs/pom.xml
index 72255363..e7158860 100644
--- a/custom-checks/findbugs/pom.xml
+++ b/custom-checks/findbugs/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat.custom-checks</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>findbugs</artifactId>
diff --git a/custom-checks/pmd/pom.xml b/custom-checks/pmd/pom.xml
index 4dfec2b9..3b86f80b 100644
--- a/custom-checks/pmd/pom.xml
+++ b/custom-checks/pmd/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat.custom-checks</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>pmd</artifactId>
diff --git a/custom-checks/pom.xml b/custom-checks/pom.xml
index daf19670..5963e801 100644
--- a/custom-checks/pom.xml
+++ b/custom-checks/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <groupId>org.openhab.tools.sat.custom-checks</groupId>
diff --git a/pom.xml b/pom.xml
index a81a0fd1..c83e42b1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.openhab.tools.sat</groupId>
   <artifactId>pom</artifactId>
-  <version>0.19.0-SNAPSHOT</version>
+  <version>1.0.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Static Code Analysis Tool Parent POM</name>
@@ -56,7 +56,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <oh.java.version>11</oh.java.version>
+    <oh.java.version>21</oh.java.version>
     <maven.compiler.release>${oh.java.version}</maven.compiler.release>
     <maven.eclipse.version>2.10</maven.eclipse.version>
     <junit.version>5.11.4</junit.version>
@@ -67,7 +67,7 @@
     <pmd.version>7.18.0</pmd.version>
     <checkstyle.version>10.26.1</checkstyle.version>
     <spotbugs.version>4.9.8</spotbugs.version>
-    <maven.core.version>3.9.11</maven.core.version>
+    <maven.core.version>3.9.12</maven.core.version>
     <maven.plugin.api.version>3.9.12</maven.plugin.api.version>
     <maven.plugin.annotations.version>3.15.2</maven.plugin.annotations.version>
     <maven.plugin.plugin.version>3.15.2</maven.plugin.plugin.version>
@@ -399,14 +399,12 @@
           <dependency>
             <groupId>org.codehaus.plexus</groupId>
             <artifactId>plexus-compiler-eclipse</artifactId>
-            <!-- cannot go beyond 2.12.1 as long as Java11 is in use -->
-            <version>2.12.1</version>
+            <version>2.16.1</version>
           </dependency>
           <dependency>
             <groupId>org.eclipse.jdt</groupId>
             <artifactId>ecj</artifactId>
-            <!-- cannot go beyond 3.33.0 as long as Java11 is in use -->
-            <version>3.33.0</version>
+            <version>3.43.0</version>
           </dependency>
         </dependencies>
       </plugin>
@@ -432,7 +430,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <version>3.12.0</version>
         <configuration>
-          <source>11</source>
+          <source>21</source>
           <outputDirectory>${project.build.directory}/javadoc</outputDirectory>
           <doclint>all,-missing</doclint>
           <failOnError>true</failOnError>
@@ -461,7 +459,7 @@
                   <version>3.6.3</version>
                 </requireMavenVersion>
                 <requireJavaVersion>
-                  <version>[11.0,12.0)</version>
+                  <version>[21.0,22.0),[25.0,26.0)</version>
                 </requireJavaVersion>
               </rules>
             </configuration>
diff --git a/sat-extension/pom.xml b/sat-extension/pom.xml
index 55c1d7b9..5f5803bc 100644
--- a/sat-extension/pom.xml
+++ b/sat-extension/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>sat-extension</artifactId>
diff --git a/sat-plugin/pom.xml b/sat-plugin/pom.xml
index f989b6da..12bb3fd4 100644
--- a/sat-plugin/pom.xml
+++ b/sat-plugin/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.openhab.tools.sat</groupId>
     <artifactId>pom</artifactId>
-    <version>0.19.0-SNAPSHOT</version>
+    <version>1.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>sat-plugin</artifactId>