killbill-memoizeit

diff --git a/beatrix/src/main/java/org/killbill/billing/beatrix/extbus/BeatrixListener.java b/beatrix/src/main/java/org/killbill/billing/beatrix/extbus/BeatrixListener.java
index 01c8e9a..3840cd5 100644
--- a/beatrix/src/main/java/org/killbill/billing/beatrix/extbus/BeatrixListener.java
+++ b/beatrix/src/main/java/org/killbill/billing/beatrix/extbus/BeatrixListener.java
@@ -61,6 +61,7 @@ import org.slf4j.LoggerFactory;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.datatype.joda.JodaModule;
+import com.google.common.eventbus.AllowConcurrentEvents;
 import com.google.common.eventbus.Subscribe;
 
 public class BeatrixListener {
@@ -91,6 +92,7 @@ public class BeatrixListener {
         objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
     }
 
+    @AllowConcurrentEvents
     @Subscribe
     public void handleAllInternalKillbillEvents(final BusInternalEvent event) {
         final InternalCallContext internalContext = internalCallContextFactory.createInternalCallContext(event.getSearchKey2(), event.getSearchKey1(), "BeatrixListener", CallOrigin.INTERNAL, UserType.SYSTEM, event.getUserToken());