diff --git a/core/src/main/java/hudson/PluginWrapper.java b/core/src/main/java/hudson/PluginWrapper.java
index 2c0a516414..02dfc378fd 100644
--- a/core/src/main/java/hudson/PluginWrapper.java
+++ b/core/src/main/java/hudson/PluginWrapper.java
@@ -69,7 +69,7 @@ import org.kohsuke.stapler.HttpResponses;
  *
  * @author Kohsuke Kawaguchi
  */
-public final class PluginWrapper implements Comparable<PluginWrapper> {
+public class PluginWrapper implements Comparable<PluginWrapper> {
     /**
      * {@link PluginManager} to which this belongs to.
      */