diff --git a/package.json b/package.json
index 6a5c29a..e40ac7a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@extollo/lib",
-  "version": "0.9.6",
+  "version": "0.9.7",
   "description": "The framework library that lifts up your code.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/src/support/bus/Bus.ts b/src/support/bus/Bus.ts
index fb3e9df..8bac60b 100644
--- a/src/support/bus/Bus.ts
+++ b/src/support/bus/Bus.ts
@@ -8,7 +8,7 @@ import {
     EventHandlerReturn,
     EventHandlerSubscription,
 } from './types'
-import {Awaitable, Collection, Pipeline, uuid4} from '../../util'
+import {Awaitable, Collection, ifDebugging, Pipeline, uuid4} from '../../util'
 import {Logging} from '../../service/Logging'
 import {Unit} from '../../lifecycle/Unit'
 import {Config} from '../../service/Config'
@@ -185,6 +185,9 @@ export class Bus<TEvent extends Event = Event> extends Unit implements EventBus<
     async up(): Promise<void> {
         if ( this.isUp ) {
             this.logging.warn('Attempted to boot more than once. Skipping.')
+            ifDebugging('extollo.bus', () => {
+                throw new Error('Attempted to boot more than once. Skipping.')
+            })
             return
         }
 
diff --git a/src/support/bus/LocalBus.ts b/src/support/bus/LocalBus.ts
index 70d192f..ebc3c90 100644
--- a/src/support/bus/LocalBus.ts
+++ b/src/support/bus/LocalBus.ts
@@ -1,6 +1,6 @@
 import {Inject, Injectable, StaticInstantiable} from '../../di'
 import {BusSubscriber, Event, EventBus, EventHandler, EventHandlerReturn, EventHandlerSubscription} from './types'
-import {Awaitable, Collection, Pipeline, uuid4} from '../../util'
+import {Awaitable, Collection, ifDebugging, Pipeline, uuid4} from '../../util'
 import {Logging} from '../../service/Logging'
 import {Bus, BusInternalSubscription} from './Bus'
 import {getEventName} from './getEventName'
@@ -109,6 +109,9 @@ export class LocalBus<TEvent extends Event = Event> extends CanonicalItemClass i
     async up(): Promise<void> {
         if ( this.isUp ) {
             this.logging.warn('Attempted to boot more than once. Skipping.')
+            ifDebugging('extollo.bus', () => {
+                throw new Error('Attempted to boot more than once. Skipping.')
+            })
             return
         }