diff --git a/README.md b/README.md
index 344ec27..c967a78 100644
--- a/README.md
+++ b/README.md
@@ -53,28 +53,28 @@ Initially the project will continue to be a compatible drop-in replacement for e
     <dependency>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j</artifactId>
-        <version>2.2.4</version>
+        <version>2.3.1</version>
     </dependency>
     <dependency>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-xalan</artifactId>
-        <version>2.2.4</version>
+        <version>2.3.1</version>
     </dependency>
     <dependency>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-xgc</artifactId>
-        <version>2.2.4</version>
+        <version>2.3.1</version>
     </dependency>
     <dependency>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-fop-ext</artifactId>
-        <version>2.2.4</version>
+        <version>2.3.1</version>
     </dependency>
 ```
 
 ### V2.3.* (should be drop in replacement, possibly minor changes):
 
- - The 2.3.0 release supports JDK 1.8 and above
+ - The 2.3.1 release supports JDK 1.8 and above
  - Drop all uses of the now defunct Avalon Framework. See [issue #15](https://github.com/SingingBush/barcode4j/issues/15)
  - Remove the Ant build
 
diff --git a/aggregate-report/pom.xml b/aggregate-report/pom.xml
index c314058..562dbbb 100644
--- a/aggregate-report/pom.xml
+++ b/aggregate-report/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>aggregate-report</artifactId>
diff --git a/barcode4j-ant/pom.xml b/barcode4j-ant/pom.xml
index 7433ef6..08860c3 100644
--- a/barcode4j-ant/pom.xml
+++ b/barcode4j-ant/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-ant</artifactId>
diff --git a/barcode4j-cli/pom.xml b/barcode4j-cli/pom.xml
index 5114a05..64971e2 100644
--- a/barcode4j-cli/pom.xml
+++ b/barcode4j-cli/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-cli</artifactId>
diff --git a/barcode4j-examples/bitmap/pom.xml b/barcode4j-examples/bitmap/pom.xml
index a32020d..4055fa2 100644
--- a/barcode4j-examples/bitmap/pom.xml
+++ b/barcode4j-examples/bitmap/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-examples</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/barcode4j-examples/pom.xml b/barcode4j-examples/pom.xml
index b49b295..172e041 100644
--- a/barcode4j-examples/pom.xml
+++ b/barcode4j-examples/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-examples</artifactId>
diff --git a/barcode4j-examples/swing/pom.xml b/barcode4j-examples/swing/pom.xml
index 667c8cf..c8e1101 100644
--- a/barcode4j-examples/swing/pom.xml
+++ b/barcode4j-examples/swing/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-examples</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/barcode4j-examples/xsl-fo/pom.xml b/barcode4j-examples/xsl-fo/pom.xml
index da8e5ee..08c4656 100644
--- a/barcode4j-examples/xsl-fo/pom.xml
+++ b/barcode4j-examples/xsl-fo/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-examples</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/barcode4j-fop-ext/pom.xml b/barcode4j-fop-ext/pom.xml
index c279193..acc9e90 100644
--- a/barcode4j-fop-ext/pom.xml
+++ b/barcode4j-fop-ext/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-fop-ext</artifactId>
diff --git a/barcode4j-jdom/pom.xml b/barcode4j-jdom/pom.xml
index ae2120e..aebc58b 100644
--- a/barcode4j-jdom/pom.xml
+++ b/barcode4j-jdom/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-jdom</artifactId>
diff --git a/barcode4j-saxon8/pom.xml b/barcode4j-saxon8/pom.xml
index c43bfc8..4d53bf8 100644
--- a/barcode4j-saxon8/pom.xml
+++ b/barcode4j-saxon8/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-saxon8</artifactId>
diff --git a/barcode4j-saxon91/pom.xml b/barcode4j-saxon91/pom.xml
index d2337cc..69dc5a4 100644
--- a/barcode4j-saxon91/pom.xml
+++ b/barcode4j-saxon91/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-saxon91</artifactId>
diff --git a/barcode4j-servlet/pom.xml b/barcode4j-servlet/pom.xml
index 4c21218..10c64e8 100644
--- a/barcode4j-servlet/pom.xml
+++ b/barcode4j-servlet/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-servlet</artifactId>
diff --git a/barcode4j-xalan/pom.xml b/barcode4j-xalan/pom.xml
index 0ea883b..1c2bcd7 100644
--- a/barcode4j-xalan/pom.xml
+++ b/barcode4j-xalan/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-xalan</artifactId>
diff --git a/barcode4j-xgc/pom.xml b/barcode4j-xgc/pom.xml
index 9f65d97..bf15d1c 100644
--- a/barcode4j-xgc/pom.xml
+++ b/barcode4j-xgc/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j-xgc</artifactId>
diff --git a/barcode4j/pom.xml b/barcode4j/pom.xml
index 9ef737e..b03393c 100644
--- a/barcode4j/pom.xml
+++ b/barcode4j/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.singingbush</groupId>
         <artifactId>barcode4j-parent</artifactId>
-        <version>2.3.1-SNAPSHOT</version>
+        <version>2.3.1</version>
     </parent>
 
     <artifactId>barcode4j</artifactId>
diff --git a/pom.xml b/pom.xml
index 2329d22..75d9916 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
     <groupId>com.singingbush</groupId>
     <artifactId>barcode4j-parent</artifactId>
     <packaging>pom</packaging>
-    <version>2.3.1-SNAPSHOT</version>
+    <version>2.3.1</version>
 
     <modules>
         <module>barcode4j</module>
@@ -129,7 +129,7 @@
         <net.sf.saxon.9.version>9.1.0.8</net.sf.saxon.9.version>
 
         <slf4j.version>2.0.16</slf4j.version>
-        <junit.version>5.11.2</junit.version>
+        <junit.version>5.11.3</junit.version>
     </properties>
 
     <dependencyManagement>
@@ -150,7 +150,7 @@
             <dependency>
                 <groupId>org.jetbrains</groupId>
                 <artifactId>annotations</artifactId>
-                <version>26.0.0</version>
+                <version>26.0.1</version>
                 <scope>provided</scope>
                 <!-- set to provided so they don't get bundled into the jar (not needed at runtime) -->
                 <optional>true</optional>
@@ -284,7 +284,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-dependency-plugin</artifactId>
-                    <version>3.8.0</version>
+                    <version>3.8.1</version>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
@@ -335,7 +335,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-site-plugin</artifactId>
-                    <version>3.20.0</version>
+                    <version>3.21.0</version>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
@@ -400,7 +400,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-gpg-plugin</artifactId>
-                    <version>3.2.6</version>
+                    <version>3.2.7</version>
                 </plugin>
                 <!-- other plugins -->
                 <plugin>
@@ -411,7 +411,7 @@
                 <plugin>
                     <groupId>com.github.spotbugs</groupId>
                     <artifactId>spotbugs-maven-plugin</artifactId>
-                    <version>4.8.6.4</version>
+                    <version>4.8.6.5</version>
                 </plugin>
                 <plugin>
                     <groupId>org.jacoco</groupId>