diff --git a/maven-plugin-testing-harness/pom.xml b/maven-plugin-testing-harness/pom.xml
index c02db2d..576ab3e 100644
--- a/maven-plugin-testing-harness/pom.xml
+++ b/maven-plugin-testing-harness/pom.xml
@@ -120,7 +120,7 @@ under the License.
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-testing</artifactId>
-      <version>1.5.0</version>
+      <version>1.6.0</version>
       <exclusions>
         <exclusion>
           <!-- we need as optional dependencies -->