diff --git a/src/pages/course/course-page.vue b/src/pages/course/course-page.vue
index 9bcc477..de9b896 100644
--- a/src/pages/course/course-page.vue
+++ b/src/pages/course/course-page.vue
@@ -23,11 +23,12 @@
 
 <script lang="ts">
     import {Component, Prop, Vue} from 'vue-property-decorator';
-    import {Assignment, Course} from '@/components/app/app';
+    import {Assignment} from '@/components/app/app';
     import CourseHead from '@/pages/overall/overall-course/course-head/course-head.vue';
     import CourseScatter from '@/pages/course/course-scatter/course-scatter';
     import AssignmentEntry from '@/pages/overall/overall-course/assignment-entry/assignment-entry.vue';
     import AssignmentTypeHead from '@/pages/course/assignment-type-head/assignment-type-head.vue';
+    import Course from '@/logic/course';
 
     @Component({
         components: {AssignmentEntry, CourseHead, CourseScatter, AssignmentTypeHead}
diff --git a/src/pages/course/course-scatter/course-scatter.ts b/src/pages/course/course-scatter/course-scatter.ts
index e094045..a3e7c0c 100644
--- a/src/pages/course/course-scatter/course-scatter.ts
+++ b/src/pages/course/course-scatter/course-scatter.ts
@@ -1,8 +1,9 @@
 import {Component, Prop, Vue} from 'vue-property-decorator';
-import {Assignment, Course} from '@/components/app/app';
+import {Assignment} from '@/components/app/app';
 import Constants from '@/constants';
 import {FormatUtils} from '@/utils/format-utils';
 import moment from 'moment';
+import Course from '@/logic/course';
 
 @Component({
 })
diff --git a/src/pages/overall/overall-course/overall-course.ts b/src/pages/overall/overall-course/overall-course.ts
index 548fa55..2985735 100644
--- a/src/pages/overall/overall-course/overall-course.ts
+++ b/src/pages/overall/overall-course/overall-course.ts
@@ -1,7 +1,8 @@
 import {Component, Prop, Vue} from 'vue-property-decorator';
-import App, {Assignment, Course} from '@/components/app/app';
+import App, {Assignment} from '@/components/app/app';
 import AssignmentEntry from '@/pages/overall/overall-course/assignment-entry/assignment-entry.vue';
 import CourseHead from '@/pages/overall/overall-course/course-head/course-head.vue';
+import Course from '@/logic/course';
 
 @Component({
     components: {UnreadEntry: AssignmentEntry, CourseHead}