diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7e2e8df..0c883f79 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 ### ⚙️ Technical
 
+* Updated `ClusterService` to use Hoist's `InstanceNotFoundException` class to designate routine.
+
 * Exposed `/xh/ping` as whitelisted route for basic uptime/reachability checks. Retained legacy
   `/ping` alias, but prefer this new path going forward.
 
diff --git a/grails-app/services/io/xh/hoist/cluster/ClusterService.groovy b/grails-app/services/io/xh/hoist/cluster/ClusterService.groovy
index ef3ad617..cab63901 100644
--- a/grails-app/services/io/xh/hoist/cluster/ClusterService.groovy
+++ b/grails-app/services/io/xh/hoist/cluster/ClusterService.groovy
@@ -10,12 +10,11 @@ import com.hazelcast.core.HazelcastInstance
 import com.hazelcast.core.IExecutorService
 import io.xh.hoist.BaseService
 import io.xh.hoist.ClusterConfig
+import io.xh.hoist.exception.InstanceNotFoundException
 import io.xh.hoist.util.Utils
 import org.springframework.boot.context.event.ApplicationReadyEvent
 import org.springframework.context.ApplicationListener
 
-import javax.management.InstanceNotFoundException
-
 class ClusterService extends BaseService implements ApplicationListener<ApplicationReadyEvent> {
 
     /**