diff --git a/pmml-sparkml-example/pom.xml b/pmml-sparkml-example/pom.xml
index cb06659..7066396 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>2.2.4</version>
+		<version>2.2-SNAPSHOT</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sparkml-lightgbm/pom.xml b/pmml-sparkml-lightgbm/pom.xml
index f3cf006..6357df7 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>2.2.4</version>
+		<version>2.2-SNAPSHOT</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sparkml-xgboost/pom.xml b/pmml-sparkml-xgboost/pom.xml
index 90bb0fb..85c52b7 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>2.2.4</version>
+		<version>2.2-SNAPSHOT</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pmml-sparkml/pom.xml b/pmml-sparkml/pom.xml
index 8feaa50..de8c2a1 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>2.2.4</version>
+		<version>2.2-SNAPSHOT</version>
 	</parent>
 
 	<groupId>org.jpmml</groupId>
diff --git a/pom.xml b/pom.xml
index bd4c0ce..521a6a8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
 	<groupId>org.jpmml</groupId>
 	<artifactId>jpmml-sparkml</artifactId>
-	<version>2.2.4</version>
+	<version>2.2-SNAPSHOT</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>2.2.4</tag>
+		<tag>HEAD</tag>
 	</scm>
 	<issueManagement>
 		<system>GitHub</system>
@@ -51,7 +51,7 @@
 	</issueManagement>
 
 	<properties>
-		<project.build.outputTimestamp>2024-06-20T08:34:13Z</project.build.outputTimestamp>
+		<project.build.outputTimestamp>2024-06-20T08:35:46Z</project.build.outputTimestamp>
 
 		<synapseml-lightgbm.version>[0.9.5,)</synapseml-lightgbm.version>
 		<!-- XXX: The 2.0.2 and 2.0.3 versions are invalid -->
@@ -65,22 +65,22 @@
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml</artifactId>
-				<version>2.2.4</version>
+				<version>2.2-SNAPSHOT</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml-example</artifactId>
-				<version>2.2.4</version>
+				<version>2.2-SNAPSHOT</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml-lightgbm</artifactId>
-				<version>2.2.4</version>
+				<version>2.2-SNAPSHOT</version>
 			</dependency>
 			<dependency>
 				<groupId>org.jpmml</groupId>
 				<artifactId>pmml-sparkml-xgboost</artifactId>
-				<version>2.2.4</version>
+				<version>2.2-SNAPSHOT</version>
 			</dependency>
 
 			<dependency>