diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 81bad513..bc684bcb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,11 +23,11 @@ jobs:
         ref: badges
         path: badges
 
-    - name: Set up JDK 17
+    - name: Set up JDK 25
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
 
     - name: Build with Maven
       run: mvn -B package -Pcoverage
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index ee3cab1f..42e6580f 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -37,11 +37,11 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v7
 
-    - name: Set up JDK 17
+    - name: Set up JDK 25
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 4fc8bca6..903cf11a 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -25,11 +25,11 @@ jobs:
         ref: gh-pages
         path: gh-pages
 
-    - name: Set up JDK 17
+    - name: Set up JDK 25
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
 
     - name: Build docs with Maven
       run: mvn compile javadoc:javadoc
diff --git a/.github/workflows/manual-deploy-github-only.yml b/.github/workflows/manual-deploy-github-only.yml
index 2fdcb731..e79f39a1 100644
--- a/.github/workflows/manual-deploy-github-only.yml
+++ b/.github/workflows/manual-deploy-github-only.yml
@@ -18,11 +18,11 @@ jobs:
     steps:
     - uses: actions/checkout@v7
 
-    - name: Set up JDK 17 for deploy to github packages
+    - name: Set up JDK 25 for deploy to github packages
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
         server-id: github
 
     - name: Build with Maven
diff --git a/.github/workflows/manual-deploy.yml b/.github/workflows/manual-deploy.yml
index 73c22a84..795db8a9 100644
--- a/.github/workflows/manual-deploy.yml
+++ b/.github/workflows/manual-deploy.yml
@@ -17,11 +17,11 @@ jobs:
 
     steps:
     - uses: actions/checkout@v7
-    - name: Set up JDK 17
+    - name: Set up JDK 25
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
         server-id: github
         
     - name: Build with Maven
diff --git a/.github/workflows/maven-publish.yml b/.github/workflows/maven-publish.yml
index c8cf40c9..a91e3845 100644
--- a/.github/workflows/maven-publish.yml
+++ b/.github/workflows/maven-publish.yml
@@ -19,11 +19,11 @@ jobs:
       id: get_version
       run: echo "VERSION=${GITHUB_REF/refs\/tags\/v/}" >> $GITHUB_OUTPUT
 
-    - name: Set up JDK 17 for deploy to Central
+    - name: Set up JDK 25 for deploy to Central
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
         server-id: central 
         server-username: MAVEN_USERNAME
         server-password: MAVEN_CENTRAL_TOKEN
@@ -43,11 +43,11 @@ jobs:
         MAVEN_CENTRAL_TOKEN: ${{ secrets.MAVEN_CENTRAL_TOKEN }}
         MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}		
 
-    - name: Set up JDK 17 for deploy to github packages
+    - name: Set up JDK 25 for deploy to github packages
       uses: actions/setup-java@v5
       with:
-        distribution: 'adopt'
-        java-version: '17'
+        distribution: 'temurin'
+        java-version: '25'
         server-id: github 
 
     - name: Publish to GitHub Packages Apache Maven
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc3b6877..05d7965e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] - 2025-10-05
+## [Unreleased] - 2026-07-07
+
+__BREAKING CHANGES: Minimum supported Java is Java 25. Next version will be 7.0.0.__
 
 ### Added
 
@@ -18,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Refactored the internal classes associated with the hash-table implementation of Kendall Tau Sequence Distance, which were identified by RefactorFirst as highly-coupled.
 
 ### Dependencies
+* Minimum supported Java bumped to Java 25 (breaking change).
 
 ### CI/CD
 
diff --git a/README.md b/README.md
index fdb35a0d..19c98b94 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![JavaPermutationTools - A Java library for computation on permutations and sequences](https://jpt.cicirello.org/images/jpt640.png)](#javapermutationtools-jpt-a-java-library-for-computation-on-permutations-and-sequences)
 
-Copyright (C) 2018-2024 [Vincent A. Cicirello](https://www.cicirello.org/).
+Copyright (C) 2018-2026 [Vincent A. Cicirello](https://www.cicirello.org/).
 
 Website: https://jpt.cicirello.org/
 
@@ -32,13 +32,14 @@ computation on permutations and sequences. It includes implementations of a vari
 of permutation distance metrics as well as distance metrics on sequences (i.e., Strings, 
 arrays, and other ordered data types). 
 
-## Java 17+
+## Java 25+
 
-We currently support Java 17+. See the following table for mapping between library version
+We currently support Java 25+. See the following table for mapping between library version
 and minimum supported Java version.
 
 | version | Java requirements |
 | --- | --- |
+| 7.x.y | Java 25+ |
 | 4.w.x to 6.y.z | Java 17+ |
 | 3.x.y | Java 11+ |
 | 1.w.x to 2.y.z | Java 8+ |
@@ -123,14 +124,14 @@ module your.module.name.here {
 
 ## Importing the Library from Maven Central
 
-Add this to the dependencies section of your pom.xml, replacing the version number 
-with the version you want to use.
+Add this to the dependencies section of your pom.xml, replacing the `x.y.z` with the
+version number of the version that you want to use.
 
 ```XML
 <dependency>
   <groupId>org.cicirello</groupId>
   <artifactId>jpt</artifactId>
-  <version>5.0.0</version>
+  <version>x.y.z</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index 89f933ae..c64d236e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
  
 	<groupId>org.cicirello</groupId>
 	<artifactId>jpt</artifactId>
-	<version>6-SNAPSHOT</version>
+	<version>7-SNAPSHOT</version>
 	<packaging>jar</packaging>
 
 	<name>JavaPermutationTools</name>
@@ -30,7 +30,7 @@
 			<distribution>repo</distribution>
 			<comments>
 			JavaPermutationTools (JPT): A library for computation on permutations and sequences.
-			Copyright (C) 2005-2025 Vincent A. Cicirello.
+			Copyright (C) 2005-2026 Vincent A. Cicirello.
 
 			JavaPermutationTools is free software: you can redistribute it and/or modify
 			it under the terms of the GNU General Public License as published by
@@ -219,7 +219,7 @@
   
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<maven.compiler.release>17</maven.compiler.release>
+		<maven.compiler.release>25</maven.compiler.release>
 	</properties>
   
 	<build>
@@ -229,7 +229,7 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.15.0</version>
 				<configuration>
-					<release>17</release>
+					<release>25</release>
 				</configuration>
 			</plugin>
 			<plugin>
@@ -270,7 +270,7 @@
 						<link>https://rho-mu.cicirello.org/api</link>
 						<link>https://core.cicirello.org/api</link>
 					</links>
-					<bottom><![CDATA[Copyright &copy; 2005-2025 <a href=\"https://www.cicirello.org/\" target=_top>Vincent A. Cicirello</a>.  All rights reserved.]]></bottom>
+					<bottom><![CDATA[Copyright &copy; 2005-2026 <a href=\"https://www.cicirello.org/\" target=_top>Vincent A. Cicirello</a>.  All rights reserved.]]></bottom>
 				</configuration>
 			</plugin>
 			<plugin>
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index d54b13b9..155dda3c 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -1,6 +1,6 @@
 /*
  * JavaPermutationTools - A Java library for computation on permutations.
- * Copyright 2005-2024 Vincent A. Cicirello, <https://www.cicirello.org/>.
+ * Copyright 2005-2026 Vincent A. Cicirello, <https://www.cicirello.org/>.
  *
  * JavaPermutationTools is free software: you can
  * redistribute it and/or modify it under the terms of the GNU
@@ -24,7 +24,7 @@
  *
  * <h2>JavaPermutationTools - A Java library for computation on permutations</h2>
  *
- * <p>Copyright &copy; 2005-2024 <a href="https://www.cicirello.org/" target=_top>Vincent A.
+ * <p>Copyright &copy; 2005-2026 <a href="https://www.cicirello.org/" target=_top>Vincent A.
  * Cicirello</a>.
  *
  * <p><a href="https://doi.org/10.21105/joss.00950"><img