diff --git a/client/src/app/shared/models/agenda/speaker.ts b/client/src/app/shared/models/agenda/speaker.ts
index c321c3421..a6fdd2ece 100644
--- a/client/src/app/shared/models/agenda/speaker.ts
+++ b/client/src/app/shared/models/agenda/speaker.ts
@@ -1,4 +1,4 @@
-import { BaseModel } from '../base/base-model';
+import { Deserializer } from '../base/deserializer';
 
 /**
  * Representation of a speaker in an agenda item.
@@ -7,7 +7,7 @@ import { BaseModel } from '../base/base-model';
  * Part of the 'speakers' list.
  * @ignore
  */
-export class Speaker extends BaseModel {
+export class Speaker extends Deserializer {
     public id: number;
     public user_id: number;
     public begin_time: string; // TODO this is a time object
diff --git a/client/src/app/site/base/base-view-model.ts b/client/src/app/site/base/base-view-model.ts
index d223e416d..05b58a057 100644
--- a/client/src/app/site/base/base-view-model.ts
+++ b/client/src/app/site/base/base-view-model.ts
@@ -1,6 +1,6 @@
-import { BaseModel } from '../../shared/models/base/base-model';
 import { Displayable } from '../../shared/models/base/displayable';
 import { Identifiable } from '../../shared/models/base/identifiable';
+import { Deserializable } from 'app/shared/models/base/deserializable';
 
 /**
  * Base class for view models. alls view models should have titles.
@@ -11,7 +11,7 @@ export abstract class BaseViewModel implements Displayable, Identifiable {
      */
     public abstract id: number;
 
-    public abstract updateValues(update: BaseModel): void;
+    public abstract updateValues(update: Deserializable): void;
 
     public abstract getTitle(): string;