Jenkins 1.545 and maven plugin 2.1 (pinned)

gistfile1.txt

org.jvnet.hudson.plugins.mavendepsupdate.MavenDependencyUpdateTrigger.run() failed for myawesomebuild
java.lang.NoClassDefFoundError: org/sonatype/aether/repository/WorkspaceReader
	at org.jvnet.hudson.plugins.mavendepsupdate.MavenDependencyUpdateTrigger.run(MavenDependencyUpdateTrigger.java:153)
	at hudson.triggers.Trigger.checkTriggers(Trigger.java:255)
	at hudson.triggers.Trigger$Cron.doRun(Trigger.java:203)
	at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.ClassNotFoundException: org.sonatype.aether.repository.WorkspaceReader
	at hudson.ClassicPluginStrategy$DependencyClassLoader.findClass(ClassicPluginStrategy.java:589)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at org.apache.tools.ant.AntClassLoader.findBaseClass(AntClassLoader.java:1387)
	at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1080)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	... 11 more