a few easy dependency updates
diff --git a/pom.xml b/pom.xml
index 831bcca..c09f110 100644
--- a/pom.xml
+++ b/pom.xml
@@ -118,17 +118,17 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>
-      <version>3.0.24</version>
+      <version>3.3.0</version>
     </dependency>
     <dependency>
       <groupId>commons-io</groupId>
       <artifactId>commons-io</artifactId>
-      <version>2.5</version>
+      <version>2.6</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>3.8.1</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>