diff --git a/mrm-servlet/src/test/java/org/codehaus/mojo/mrm/impl/maven/MockArtifactStoreTest.java b/mrm-servlet/src/test/java/org/codehaus/mojo/mrm/impl/maven/MockArtifactStoreTest.java
index 3a0ddb0d..60bc4143 100644
--- a/mrm-servlet/src/test/java/org/codehaus/mojo/mrm/impl/maven/MockArtifactStoreTest.java
+++ b/mrm-servlet/src/test/java/org/codehaus/mojo/mrm/impl/maven/MockArtifactStoreTest.java
@@ -72,9 +72,9 @@ public void testDirectoryContent() throws Exception
         Artifact mainArtifact = new Artifact( "localhost", "mrm-15", "1.0", "jar" );
         assertNotNull( artifactStore.get( mainArtifact ) );
 
-        List<String> names = new ArrayList<String>();
-        JarInputStream jis = new JarInputStream( artifactStore.get( mainArtifact ) );
-        try
+        List<String> names = new ArrayList<>();
+
+        try (JarInputStream jis = new JarInputStream( artifactStore.get( mainArtifact ) ) )
         {
             JarEntry jarEntry;
             while ( ( jarEntry = jis.getNextJarEntry() ) != null )
@@ -82,10 +82,6 @@ public void testDirectoryContent() throws Exception
                 names.add( jarEntry.getName() );
             }
         }
-        finally
-        {
-            jis.close();
-        }
         
         assertTrue( names.contains( "README.txt" ) );
     }
diff --git a/pom.xml b/pom.xml
index afa24ddb..53cb15e1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -132,12 +132,12 @@
       <dependency>
         <groupId>org.codehaus.plexus</groupId>
         <artifactId>plexus-utils</artifactId>
-        <version>3.0.24</version>
+        <version>3.4.0</version>
       </dependency>
       <dependency>
         <groupId>org.codehaus.plexus</groupId>
         <artifactId>plexus-archiver</artifactId>
-        <version>3.4</version>
+        <version>4.2.5</version>
       </dependency>
       <dependency>
         <groupId>org.apache.maven</groupId>