Update the Apache parent POM, maven-site-plugin and maven-fluido-skin.
diff --git a/pom.xml b/pom.xml
index 3d7ba34..d9629bf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
-        <version>17</version>
+        <version>18</version>
     </parent>
     <groupId>org.apache.ws</groupId>
     <artifactId>ws-parent</artifactId>
@@ -84,7 +84,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-site-plugin</artifactId>
-                <version>3.4</version>
+                <version>3.6</version>
                 <configuration>
                     <skipDeploy>true</skipDeploy>
                 </configuration>
diff --git a/src/site/site.xml b/src/site/site.xml
index def36b1..8644c07 100644
--- a/src/site/site.xml
+++ b/src/site/site.xml
@@ -21,7 +21,7 @@
     <skin>
         <groupId>org.apache.maven.skins</groupId>
         <artifactId>maven-fluido-skin</artifactId>
-        <version>1.4</version>
+        <version>1.6</version>
     </skin>
     <bannerRight>
         <src>http://ws.apache.org/images/project-logo.jpg</src>