diff --git a/libs/newsletter/src/driver/interfaces/newsletter-service.interface.ts b/libs/newsletter/src/driver/interfaces/newsletter-service.interface.ts
index 97b0beb943..41e3559522 100644
--- a/libs/newsletter/src/driver/interfaces/newsletter-service.interface.ts
+++ b/libs/newsletter/src/driver/interfaces/newsletter-service.interface.ts
@@ -2,7 +2,7 @@ import { Observable } from 'rxjs';
 import { InjectionToken } from '@angular/core';
 import { DaffNewsletterSubmission } from '../../models/newsletter.model';
 
-export const DaffNewsletterDriver = new InjectionToken('DaffNewsletterDriver');
+export const DaffNewsletterDriver = new InjectionToken<DaffNewsletterServiceInterface<DaffNewsletterSubmission, unknown>>('DaffNewsletterDriver');
 export interface DaffNewsletterServiceInterface<T extends DaffNewsletterSubmission, V> {
 	send(email: T): Observable<V>;
-}
\ No newline at end of file
+}