diff --git a/.gitignore b/.gitignore
index 19ba0e5..bd7e011 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ target/
 out/
 *.versionsBackup
 
+.gitnexus
diff --git a/README.md b/README.md
index 1a0fbe6..04fb346 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,11 @@
 # Mapcode Library for Java
 
-[![Codacy Badge](https://api.codacy.com/project/badge/Grade/0c9f11645f504b50bd154a80fb95a5c3)](https://www.codacy.com/app/rijnb/mapcode-java?utm_source=github.com&utm_medium=referral&utm_content=mapcode-foundation/mapcode-java&utm_campaign=Badge_Grade)
-[![Build Status](https://img.shields.io/travis/mapcode-foundation/mapcode-java.svg?maxAge=3600&branch=master)](https://travis-ci.org/mapcode-foundation/mapcode-java)
 [![Coverage Status](https://coveralls.io/repos/github/mapcode-foundation/mapcode-java/badge.svg?branch=master&maxAge=3600)](https://coveralls.io/github/mapcode-foundation/mapcode-java?branch=master)
 [![License](http://img.shields.io/badge/license-APACHE2-blue.svg)]()
 [![Release](https://img.shields.io/github/release/mapcode-foundation/mapcode-java.svg?maxAge=3600)](https://github.com/mapcode-foundation/mapcode-java/releases)
 [![Maven Central](https://img.shields.io/maven-central/v/com.mapcode/mapcode.svg?maxAge=3600)](https://maven-badges.herokuapp.com/maven-central/com.mapcode/mapcode)
 
-**Copyright (C) 2014-2021, Stichting Mapcode Foundation (http://www.mapcode.com)**
+**Copyright (C) 2014-2026, Stichting Mapcode Foundation (http://www.mapcode.com)**
 
 This Java project contains a library to encode latitude/longitude pairs to mapcodes
 and to decode mapcodes back to latitude/longitude pairs.
@@ -480,7 +478,12 @@ Normally, one of our developers should be able to comment on them and fix.
 
 These are the release notes for the Java library for mapcodes.
 
-### 2.4.16
+### 2.4.19
+
+* Added synonyms for territories Maco CN-MO and Mexico MX-CMX.
+* Updated dependencies.
+
+### 2.4.16-2.4.18
 
 * Updated `log4j` and `gson` dependencies.
 
diff --git a/pom.xml b/pom.xml
index d6ecf1e..a2b93fc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,7 +24,7 @@
     <artifactId>mapcode</artifactId>
 
     <packaging>jar</packaging>
-    <version>2.4.16</version>
+    <version>2.4.19</version>
 
     <name>Mapcode Java Library</name>
     <description>
@@ -97,23 +97,16 @@
         <maven-site-plugin.version>3.9.0</maven-site-plugin.version>
         <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
         <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
-        <nexus-staging-maven-plugin.version>1.6.8</nexus-staging-maven-plugin.version>
+        <central-publishing-maven-plugin.version>0.8.0</central-publishing-maven-plugin.version>
 
         <!-- libraries. -->
-        <gson.version>2.8.9</gson.version>
+        <gson.version>2.14.0</gson.version>
         <jsr305.version>3.0.2</jsr305.version>
         <junit.version>4.13.2</junit.version>
-        <log4j.version>2.17.0</log4j.version>
-        <slf4j.version>1.7.30</slf4j.version>
+        <log4j.version>2.26.0</log4j.version>
+        <slf4j.version>1.7.36</slf4j.version>
     </properties>
 
-    <distributionManagement>
-        <snapshotRepository>
-            <id>ossrh</id>
-            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
-        </snapshotRepository>
-    </distributionManagement>
-
     <build>
         <plugins>
 
@@ -215,16 +208,15 @@
                 </executions>
             </plugin>
 
-            <!-- Staging for Maven Central. -->
+            <!-- Publishing to Maven Central via the Central Portal. -->
             <plugin>
-                <groupId>org.sonatype.plugins</groupId>
-                <artifactId>nexus-staging-maven-plugin</artifactId>
-                <version>${nexus-staging-maven-plugin.version}</version>
+                <groupId>org.sonatype.central</groupId>
+                <artifactId>central-publishing-maven-plugin</artifactId>
+                <version>${central-publishing-maven-plugin.version}</version>
                 <extensions>true</extensions>
                 <configuration>
-                    <serverId>ossrh</serverId>
-                    <nexusUrl>https://oss.sonatype.org/</nexusUrl>
-                    <autoReleaseAfterClose>false</autoReleaseAfterClose>
+                    <publishingServerId>central</publishingServerId>
+                    <autoPublish>false</autoPublish>
                 </configuration>
             </plugin>
 
diff --git a/src/main/java/com/mapcode/Territory.java b/src/main/java/com/mapcode/Territory.java
index ed87378..5f4879f 100644
--- a/src/main/java/com/mapcode/Territory.java
+++ b/src/main/java/com/mapcode/Territory.java
@@ -48,7 +48,7 @@ public enum Territory {
     BLM(5, "Saint-Barthelemy"),
     NRU(6, "Nauru"),
     TUV(7, "Tuvalu"),
-    MAC(8, "Macau", new Alphabet[]{Alphabet.CHINESE, Alphabet.ROMAN}, null, new String[]{"CN-92", "CHN-92", "CN-MC", "CHN-MC"}, new String[]{"Aomen"}),
+    MAC(8, "Macau", new Alphabet[]{Alphabet.CHINESE, Alphabet.ROMAN}, null, new String[]{"CN-92", "CHN-92", "CN-MC", "CHN-MC", "CN-MO", "CHN-MO"}, new String[]{"Aomen"}),
     SXM(9, "Sint Maarten"),
     MAF(10, "Saint-Martin"),
     NFK(11, "Norfolk and Philip Island", null, null, new String[]{"AU-NF", "AUS-NF"},
@@ -277,7 +277,7 @@ public enum Territory {
     LBY(230, "Libya", new Alphabet[]{Alphabet.ARABIC, Alphabet.ROMAN, Alphabet.TIFINAGH}),
     SDN(231, "Sudan", new Alphabet[]{Alphabet.ARABIC, Alphabet.ROMAN}),
     IDN(232, "Indonesia"),
-    MX_DIF(233, "Federal District", null, MEX, new String[]{"MX-DF"}),
+    MX_DIF(233, "Federal District", null, MEX, new String[]{"MX-DF", "MX-CMX"}),
     MX_TLA(234, "Tlaxcala", null, MEX, new String[]{"MX-TL"}),
     MX_MOR(235, "Morelos", null, MEX, new String[]{"MX-MO"}),
     MX_AGU(236, "Aguascalientes", null, MEX, new String[]{"MX-AG"}),