diff --git a/frontend/app/models/project-statistic.js b/frontend/app/models/project-statistic.js
index 578b7bc83..12a607a84 100644
--- a/frontend/app/models/project-statistic.js
+++ b/frontend/app/models/project-statistic.js
@@ -5,5 +5,5 @@ export default class ProjectStatistics extends Model {
   @attr("django-duration") estimatedTime;
   @attr("django-duration") duration;
   @attr("django-duration") totalRemainingEffort;
-  @belongsTo("customer") customer;
+  @belongsTo("customer", { async: true, inverse: null }) customer;
 }
diff --git a/frontend/app/models/report-intersection.js b/frontend/app/models/report-intersection.js
index 8a6ce4202..8b3f2eb5c 100644
--- a/frontend/app/models/report-intersection.js
+++ b/frontend/app/models/report-intersection.js
@@ -8,8 +8,8 @@ export default class ReportIntersection extends Model {
   @attr("boolean", { allowNull: true, defaultValue: null }) billed;
   @attr("boolean", { allowNull: true, defaultValue: null }) verified;
 
-  @belongsTo("customer") customer;
-  @belongsTo("project") project;
-  @belongsTo("task") task;
-  @belongsTo("user") user;
+  @belongsTo("customer", { async: true, inverse: null }) customer;
+  @belongsTo("project", { async: true, inverse: null }) project;
+  @belongsTo("task", { async: true, inverse: null }) task;
+  @belongsTo("user", { async: true, inverse: null }) user;
 }