diff --git a/maven-plugin-testing-harness/pom.xml b/maven-plugin-testing-harness/pom.xml
index d5ebe252..a9a6e58b 100644
--- a/maven-plugin-testing-harness/pom.xml
+++ b/maven-plugin-testing-harness/pom.xml
@@ -131,7 +131,7 @@ under the License.
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-testing</artifactId>
-      <version>1.3.0</version>
+      <version>1.4.0</version>
       <exclusions>
         <exclusion>
           <!-- we need as optional dependencies -->