diff --git a/buildtools/pom.xml b/buildtools/pom.xml
index 2a06a64..13f3099 100644
--- a/buildtools/pom.xml
+++ b/buildtools/pom.xml
@@ -44,7 +44,7 @@
         <dependency>
             <groupId>org.codehaus.plexus</groupId>
             <artifactId>plexus-utils</artifactId>
-            <version>3.5.1</version>
+            <version>4.0.0</version>
             <optional>true</optional>
         </dependency>
         <dependency>
diff --git a/xml2fastinfoset-plugin/pom.xml b/xml2fastinfoset-plugin/pom.xml
index 1063f2b..f79fe33 100644
--- a/xml2fastinfoset-plugin/pom.xml
+++ b/xml2fastinfoset-plugin/pom.xml
@@ -80,7 +80,7 @@
         <dependency>
             <groupId>org.codehaus.plexus</groupId>
             <artifactId>plexus-utils</artifactId>
-            <version>3.5.1</version>
+            <version>4.0.0</version>
         </dependency>
         <dependency>
             <groupId>com.sun.xml.fastinfoset</groupId>