diff --git a/pmml-sparkml-example/pom.xml b/pmml-sparkml-example/pom.xml
index 1ba48ebc..e5bffebb 100644
--- a/pmml-sparkml-example/pom.xml
+++ b/pmml-sparkml-example/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sparkml</artifactId>
-		<version>2.3-SNAPSHOT</version>
+		<version>2.3.1</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sparkml-lightgbm/pom.xml b/pmml-sparkml-lightgbm/pom.xml
index a05f3d23..ac0acdf6 100644
--- a/pmml-sparkml-lightgbm/pom.xml
+++ b/pmml-sparkml-lightgbm/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sparkml</artifactId>
-		<version>2.3-SNAPSHOT</version>
+		<version>2.3.1</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sparkml-xgboost/pom.xml b/pmml-sparkml-xgboost/pom.xml
index b3f12985..2fdc2059 100644
--- a/pmml-sparkml-xgboost/pom.xml
+++ b/pmml-sparkml-xgboost/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sparkml</artifactId>
-		<version>2.3-SNAPSHOT</version>
+		<version>2.3.1</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sparkml/pom.xml b/pmml-sparkml/pom.xml
index 05d0153a..7519860d 100644
--- a/pmml-sparkml/pom.xml
+++ b/pmml-sparkml/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sparkml</artifactId>
-		<version>2.3-SNAPSHOT</version>
+		<version>2.3.1</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pom.xml b/pom.xml
index f2531871..22d60069 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
 	<groupId>org.jpmml</groupId>
 	<artifactId>jpmml-sparkml</artifactId>
-	<version>2.3-SNAPSHOT</version>
+	<version>2.3.1</version>
 	<packaging>pom</packaging>
 
 	<name>JPMML-SparkML</name>
@@ -43,7 +43,7 @@
 		<connection>scm:git:git@github.com:jpmml/jpmml-sparkml.git</connection>
 		<developerConnection>scm:git:git@github.com:jpmml/jpmml-sparkml.git</developerConnection>
 		<url>git://github.com/jpmml/jpmml-sparkml.git</url>
-		<tag>HEAD</tag>
+		<tag>2.3.1</tag>
 	</scm>
 	<issueManagement>
 		<system>GitHub</system>
@@ -55,22 +55,22 @@
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml</artifactId>
-				<version>2.3-SNAPSHOT</version>
+				<version>2.3.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml-example</artifactId>
-				<version>2.3-SNAPSHOT</version>
+				<version>2.3.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml-lightgbm</artifactId>
-				<version>2.3-SNAPSHOT</version>
+				<version>2.3.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml-xgboost</artifactId>
-				<version>2.3-SNAPSHOT</version>
+				<version>2.3.1</version>
 			</dependency>
 
 			<dependency>