diff --git a/.github/workflows/maven-verify.yml b/.github/workflows/maven-verify.yml
index c62636b5..c39f0942 100644
--- a/.github/workflows/maven-verify.yml
+++ b/.github/workflows/maven-verify.yml
@@ -27,4 +27,3 @@ jobs:
     uses: apache/maven-gh-actions-shared/.github/workflows/maven-verify.yml@v4
     with:
       maven4-build: true
-      maven4-version: '4.0.0-rc-3' # as in project, rc-4 needs some work
diff --git a/pom.xml b/pom.xml
index 6c855982..d08370c5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,7 @@ under the License.
 
   <properties>
     <javaVersion>17</javaVersion>
-    <mavenVersion>4.0.0-rc-3</mavenVersion>
+    <mavenVersion>4.0.0-rc-4</mavenVersion>
 
     <guiceVersion>6.0.0</guiceVersion>
     <mavenAntrunPluginVersion>${version.maven-antrun-plugin}</mavenAntrunPluginVersion>
@@ -135,6 +135,13 @@ under the License.
       <scope>provided</scope>
     </dependency>
 
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-xml</artifactId>
+      <version>${mavenVersion}</version>
+      <scope>provided</scope>
+    </dependency>
+
     <!-- Test -->
     <dependency>
       <groupId>org.apache.maven.plugin-testing</groupId>
@@ -237,6 +244,7 @@ under the License.
             <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-invoker-plugin</artifactId>
+              <version>3.9.1</version>
               <configuration>
                 <debug>true</debug>
                 <showErrors>true</showErrors>
diff --git a/src/it/deploy-attached-sources/invoker.properties b/src/it/deploy-attached-sources/invoker.properties
index f366f27e..a9151a19 100644
--- a/src/it/deploy-attached-sources/invoker.properties
+++ b/src/it/deploy-attached-sources/invoker.properties
@@ -16,7 +16,7 @@
 # under the License.
 
 # Clean build of the jars
-invoker.goals = clean package 
+invoker.goals = clean package
 
 # Deploy the jars in a separate step
 invoker.goals.2 = ${project.groupId}:${project.artifactId}:${project.version}:deploy-file
diff --git a/src/it/deploy-attached-sources/test.properties b/src/it/deploy-attached-sources/test.properties
index d9700072..cdf87c5b 100644
--- a/src/it/deploy-attached-sources/test.properties
+++ b/src/it/deploy-attached-sources/test.properties
@@ -21,5 +21,5 @@ pomFile = ${project.basedir}/pom.xml
 file = ${project.basedir}/target/${project.artifactId}-${project.version}.jar
 sources = ${project.basedir}/target/${project.artifactId}-${project.version}-sources.jar
 javadoc = ${project.basedir}/target/${project.artifactId}-${project.version}-javadoc.jar
-
+# not interpolated?
 url = file://${project.basedir}/target/repo
diff --git a/src/it/deploy-default-packaging/invoker.properties b/src/it/deploy-default-packaging/invoker.properties
index 95ec3347..6fbe2458 100644
--- a/src/it/deploy-default-packaging/invoker.properties
+++ b/src/it/deploy-default-packaging/invoker.properties
@@ -16,4 +16,4 @@
 # under the License.
 
 # Clean build of the jars
-invoker.goals = ${project.groupId}:${project.artifactId}:${project.version}:deploy-file 
+invoker.goals = ${project.groupId}:${project.artifactId}:${project.version}:deploy-file
diff --git a/src/it/deploy-default-packaging/test.properties b/src/it/deploy-default-packaging/test.properties
index 5e05d5fa..a695b305 100644
--- a/src/it/deploy-default-packaging/test.properties
+++ b/src/it/deploy-default-packaging/test.properties
@@ -20,4 +20,5 @@ groupId = org.apache.maven.test
 artifactId = test
 version = 1.1
 file = ${project.basedir}/lib/test-1.1.jar
+## this property is not interpolated?
 url = file://${project.basedir}/target/repo
diff --git a/src/main/java/org/apache/maven/plugins/deploy/DeployFileMojo.java b/src/main/java/org/apache/maven/plugins/deploy/DeployFileMojo.java
index 63c269ec..72d5bb5f 100644
--- a/src/main/java/org/apache/maven/plugins/deploy/DeployFileMojo.java
+++ b/src/main/java/org/apache/maven/plugins/deploy/DeployFileMojo.java
@@ -368,7 +368,7 @@ public void execute() throws MojoException {
                     ProducedArtifact deployable = session.createProducedArtifact(
                             artifact.getGroupId(),
                             artifact.getArtifactId(),
-                            artifact.getVersion().asString(),
+                            artifact.getVersion().toString(),
                             classifiers.substring(ci, nci).trim(),
                             extension,
                             type);