pom.xml in naether-0.15.8-java vs pom.xml in naether-0.15.9

@@ -1,11 +1,11 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.tobedevoured.naether</groupId>
     <artifactId>core</artifactId>
-    <version>0.15.8</version>
+    <version>0.15.9</version>
     <name>Naether</name>
     <packaging>jar</packaging>
     <url>https://github.com/mguymon/naether</url>
     <description>
         A Java Dependency Resolver using Maven’s Aether.
@@ -122,11 +122,11 @@
             </exclusions>
         </dependency>
         <dependency>
             <groupId>org.codehaus.plexus</groupId>
             <artifactId>plexus-utils</artifactId>
-            <version>3.0.8</version>
+            <version>3.0.16</version>
         </dependency>
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-aether-provider</artifactId>
             <version>${mavenVersion}</version>
@@ -200,10 +200,11 @@
                 </executions>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.5.0</version>
                 <executions>
                     <execution>
                         <id>attach-javadocs</id>
                         <goals>
                             <goal>jar</goal>
@@ -212,10 +213,9 @@
                 </executions>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>1.4</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>
                         <phase>verify</phase>
                         <goals>