diff --git a/pom.xml b/pom.xml
index d676cce..8260be3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -42,10 +42,16 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<maven.compiler.source>1.8</maven.compiler.source>
 		<maven.compiler.target>1.8</maven.compiler.target>
-		<maven.version>3.6.3</maven.version>
+		<maven.version>3.9.0</maven.version>
 	</properties>
 
 	<dependencies>
+		<!-- needs to be explicitly included, due to v3.9.0 packaging bug -->
+		<dependency>
+			<groupId>org.codehaus.plexus</groupId>
+			<artifactId>plexus-utils</artifactId>
+			<version>3.5.0</version>
+		</dependency>
 		<dependency>
 			<groupId>org.apache.maven</groupId>
 			<artifactId>maven-plugin-api</artifactId>
@@ -66,6 +72,7 @@
 			<groupId>org.apache.maven</groupId>
 			<artifactId>maven-core</artifactId>
 			<version>${maven.version}</version>
+			<scope>provided</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.maven.plugin-testing</groupId>
diff --git a/src/main/java/com/inteligr8/wildfly/maven/ModuleArtifactExtractor.java b/src/main/java/com/inteligr8/wildfly/maven/ModuleArtifactExtractor.java
index 01102ce..02383db 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/ModuleArtifactExtractor.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/ModuleArtifactExtractor.java
@@ -18,6 +18,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
 
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.model.Model;
 import org.apache.maven.model.building.DefaultModelBuildingRequest;
 import org.apache.maven.model.building.ModelBuildingException;
@@ -53,6 +54,7 @@ public class ModuleArtifactExtractor {
         if (artifact.getProperty("id", null) != null) {
             Module module = new Module();
             module.id = artifact.getProperty("id", null);
+            module.version = artifact.getProperty("version", null);
             module.exportMetaInf = Boolean.parseBoolean(artifact.getProperty("exportMetaInf", Boolean.FALSE.toString()));
             module.exportServices = Boolean.parseBoolean(artifact.getProperty("exportServices", Boolean.FALSE.toString()));
             module.exportAnnotations = Boolean.parseBoolean(artifact.getProperty("exportAnnotations", Boolean.FALSE.toString()));
@@ -81,8 +83,11 @@ public class ModuleArtifactExtractor {
                 this.getLog().debug("No 'wildfly.module.id' property; not a Wildfly module project; adding as module resource: " + artifact);
             return null;
         } else {
+            String moduleVersion = StringUtils.trimToNull(modelProps.getProperty("wildfly.module.version"));
+            
             Module module = new Module();
             module.id = moduleId;
+            module.version = moduleVersion;
             module.exportMetaInf = Boolean.parseBoolean(modelProps.getProperty("wildfly.module.meta"));
             module.exportServices = Boolean.parseBoolean(modelProps.getProperty("wildfly.module.services"));
             module.exportAnnotations = Boolean.parseBoolean(modelProps.getProperty("wildfly.module.annotations"));
@@ -90,6 +95,7 @@ public class ModuleArtifactExtractor {
             
             Map<String, String> props = new HashMap<>();
             props.put("id", module.id);
+            props.put("version", module.version);
             props.put("exportMetaInf", String.valueOf(module.exportMetaInf));
             props.put("exportServices", String.valueOf(module.exportServices));
             props.put("exportAnnotations", String.valueOf(module.exportAnnotations));
diff --git a/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractDeploymentGoal.java b/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractDeploymentGoal.java
index 1199c04..e4e34a0 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractDeploymentGoal.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractDeploymentGoal.java
@@ -34,8 +34,8 @@ import org.apache.maven.plugins.annotations.Parameter;
  */
 public abstract class AbstractDeploymentGoal extends AbstractGoal {
 
-    @Parameter( property = "wildfly.deployment.version", required = true, defaultValue = "1.3" )
-    protected String deploymentVersion;
+    @Parameter( required = true, defaultValue = "1.3" )
+    protected String deploymentSchemaVersion;
 
     @Parameter( property = "wildfly.deployment.outputDirectory", required = true, defaultValue = "${project.build.directory}/${project.build.finalName}" )
     protected File outputDirectory;
diff --git a/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractModuleGoal.java b/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractModuleGoal.java
index 2a42df7..9ddd265 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractModuleGoal.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/goal/AbstractModuleGoal.java
@@ -26,7 +26,10 @@ public abstract class AbstractModuleGoal extends AbstractGoal {
     @Parameter( property = "wildfly.module.id", required = true )
     protected String moduleId;
 
-    @Parameter( property = "wildfly.module.version", required = true, defaultValue = "1.9" )
+    @Parameter( required = true, defaultValue = "1.9" )
+    protected String moduleSchemaVersion;
+
+    @Parameter( property = "wildfly.module.version", required = true, defaultValue = "main" )
     protected String moduleVersion;
 
     @Parameter( property = "wildfly.module.outputDirectory", required = true, defaultValue = "${project.build.directory}/wildfly-module" )
@@ -41,12 +44,12 @@ public abstract class AbstractModuleGoal extends AbstractGoal {
                 throw new IllegalStateException("The formulated directory contains a file: " + directory);
         }
         
-        File mainDirectory = new File(directory, "main");
-        if (mainDirectory.exists() && !mainDirectory.isDirectory())
+        File versionDirectory = new File(directory, this.moduleVersion);
+        if (versionDirectory.exists() && !versionDirectory.isDirectory())
             throw new IllegalStateException("The formulated directory contains a file: " + directory);
         
-        mainDirectory.mkdirs();
-        return mainDirectory;
+        versionDirectory.mkdirs();
+        return versionDirectory;
     }
 
 }
diff --git a/src/main/java/com/inteligr8/wildfly/maven/goal/EarGoal.java b/src/main/java/com/inteligr8/wildfly/maven/goal/EarGoal.java
index e230949..1726a9b 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/goal/EarGoal.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/goal/EarGoal.java
@@ -49,7 +49,7 @@ public class EarGoal extends AbstractDeploymentGoal {
     @Override
     protected void executePre() throws MojoExecutionException {
         try {
-            this.deploymentXmlBuilder = new DeploymentXmlBuilder(this.deploymentVersion);
+            this.deploymentXmlBuilder = new DeploymentXmlBuilder(this.deploymentSchemaVersion);
         } catch (ParserConfigurationException pce) {
             throw new MojoExecutionException("This should never happen", pce);
         }
diff --git a/src/main/java/com/inteligr8/wildfly/maven/goal/GenerateModuleXmlGoal.java b/src/main/java/com/inteligr8/wildfly/maven/goal/GenerateModuleXmlGoal.java
index 30a59bb..af2fc71 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/goal/GenerateModuleXmlGoal.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/goal/GenerateModuleXmlGoal.java
@@ -47,7 +47,7 @@ public class GenerateModuleXmlGoal extends AbstractModuleGoal {
     @Override
     protected void executePre() throws MojoExecutionException {
         try {
-            this.moduleXmlBuilder = new ModuleXmlBuilder(this.moduleId, this.moduleVersion);
+            this.moduleXmlBuilder = new ModuleXmlBuilder(this.moduleId, this.moduleSchemaVersion);
         } catch (ParserConfigurationException pce) {
             throw new MojoExecutionException("This should never happen", pce);
         }
diff --git a/src/main/java/com/inteligr8/wildfly/maven/goal/WarGoal.java b/src/main/java/com/inteligr8/wildfly/maven/goal/WarGoal.java
index e7f78e1..ba5a9bf 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/goal/WarGoal.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/goal/WarGoal.java
@@ -67,7 +67,7 @@ public class WarGoal extends AbstractDeploymentGoal {
     @Override
     protected void executePre() throws MojoExecutionException {
         try {
-            this.deploymentXmlBuilder = new DeploymentXmlBuilder(this.deploymentVersion);
+            this.deploymentXmlBuilder = new DeploymentXmlBuilder(this.deploymentSchemaVersion);
         } catch (ParserConfigurationException pce) {
             throw new MojoExecutionException("This should never happen", pce);
         }
diff --git a/src/main/java/com/inteligr8/wildfly/maven/model/Module.java b/src/main/java/com/inteligr8/wildfly/maven/model/Module.java
index 2bd5d14..85eab22 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/model/Module.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/model/Module.java
@@ -17,6 +17,7 @@ package com.inteligr8.wildfly.maven.model;
 public class Module {
 
     public String id;
+    public String version;
     public boolean export;
     public boolean exportMetaInf;
     public boolean exportServices;
diff --git a/src/main/java/com/inteligr8/wildfly/maven/xml/AbstractXmlBuilder.java b/src/main/java/com/inteligr8/wildfly/maven/xml/AbstractXmlBuilder.java
index 8aa2c19..925c482 100644
--- a/src/main/java/com/inteligr8/wildfly/maven/xml/AbstractXmlBuilder.java
+++ b/src/main/java/com/inteligr8/wildfly/maven/xml/AbstractXmlBuilder.java
@@ -54,8 +54,12 @@ public abstract class AbstractXmlBuilder {
     public abstract String getXmlFilename();
     
     public void addDependency(Module module, boolean isDeployment) {
+        String name = module.id;
+        if (module.version != null)
+            name += ":" + module.version;
+        
         Element moduleElement = this.xmldoc.createElementNS(this.ns, "module");
-        moduleElement.setAttribute("name", module.id);
+        moduleElement.setAttribute("name", name);
         if (module.export)
             moduleElement.setAttribute("export", Boolean.TRUE.toString());
         if (isDeployment && module.exportMetaInf)