diff --git a/src/app/graph-populate.app.ts b/src/app/graph-populate.app.ts
index c4a281e..2b15a09 100644
--- a/src/app/graph-populate.app.ts
+++ b/src/app/graph-populate.app.ts
@@ -4,18 +4,12 @@ import serviceMixin from './graph-populate.service-mixin'
 import type { Application } from '@feathersjs/feathers'
 import type { InitOptions } from '../types'
 
-declare module '@feathersjs/feathers' {
-  interface Application {
-    graphPopulate: GraphPopulateApplication
-  }
-}
-
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 export function initApp(options?: InitOptions): (app: Application) => void {
   return (app: Application): void => {
     const graphPopulate = new GraphPopulateApplication(app)
 
-    app.graphPopulate = graphPopulate
+    ;(app as any).graphPopulate = graphPopulate
 
     app.mixins.push(serviceMixin)
   }
diff --git a/src/index.ts b/src/index.ts
index 4403421..2445afc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -10,5 +10,6 @@ export { paramsFromClient } from './hooks/params-from-client.hook'
 export { definePopulates } from './utils/define-populates'
 
 export { initApp as default } from './app/graph-populate.app'
+export { type GraphPopulateApplication } from './app/graph-populate.class'
 
 export * from './types'