diff --git a/pmml-sklearn-example/pom.xml b/pmml-sklearn-example/pom.xml
index 07237b43..0b79b493 100644
--- a/pmml-sklearn-example/pom.xml
+++ b/pmml-sklearn-example/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sklearn-extension/pom.xml b/pmml-sklearn-extension/pom.xml
index cc12065b..b11e3a3d 100644
--- a/pmml-sklearn-extension/pom.xml
+++ b/pmml-sklearn-extension/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sklearn-h2o/pom.xml b/pmml-sklearn-h2o/pom.xml
index 0ef372c3..f03e4f6c 100644
--- a/pmml-sklearn-h2o/pom.xml
+++ b/pmml-sklearn-h2o/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sklearn-lightgbm/pom.xml b/pmml-sklearn-lightgbm/pom.xml
index 4aaddbfa..80fc1f27 100644
--- a/pmml-sklearn-lightgbm/pom.xml
+++ b/pmml-sklearn-lightgbm/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sklearn-statsmodels/pom.xml b/pmml-sklearn-statsmodels/pom.xml
index bf34d223..bcddf112 100644
--- a/pmml-sklearn-statsmodels/pom.xml
+++ b/pmml-sklearn-statsmodels/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sklearn-xgboost/pom.xml b/pmml-sklearn-xgboost/pom.xml
index c960faf7..36f054b8 100644
--- a/pmml-sklearn-xgboost/pom.xml
+++ b/pmml-sklearn-xgboost/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sklearn/pom.xml b/pmml-sklearn/pom.xml
index 3009293e..37847467 100644
--- a/pmml-sklearn/pom.xml
+++ b/pmml-sklearn/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.jpmml</groupId>
 		<artifactId>jpmml-sklearn</artifactId>
-		<version>1.8-SNAPSHOT</version>
+		<version>1.8.4</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pom.xml b/pom.xml
index 2bef0ae6..873ec71b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
 	<groupId>org.jpmml</groupId>
 	<artifactId>jpmml-sklearn</artifactId>
-	<version>1.8-SNAPSHOT</version>
+	<version>1.8.4</version>
 	<packaging>pom</packaging>
 
 	<name>JPMML-SkLearn</name>
@@ -46,7 +46,7 @@
 		<connection>scm:git:git@github.com:jpmml/jpmml-sklearn.git</connection>
 		<developerConnection>scm:git:git@github.com:jpmml/jpmml-sklearn.git</developerConnection>
 		<url>git://github.com/jpmml/jpmml-sklearn.git</url>
-		<tag>HEAD</tag>
+		<tag>1.8.4</tag>
 	</scm>
 	<issueManagement>
 		<system>GitHub</system>
@@ -54,7 +54,7 @@
 	</issueManagement>
 
 	<properties>
-		<project.build.outputTimestamp>2024-05-20T06:34:39Z</project.build.outputTimestamp>
+		<project.build.outputTimestamp>2024-06-19T18:56:59Z</project.build.outputTimestamp>
 	</properties>
 
 	<dependencyManagement>
@@ -62,37 +62,37 @@
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn-example</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn-extension</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn-h2o</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn-lightgbm</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn-statsmodels</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sklearn-xgboost</artifactId>
-				<version>1.8-SNAPSHOT</version>
+				<version>1.8.4</version>
 			</dependency>
 
 			<dependency>