diff --git a/aleksis/apps/chronos/frontend/components/SelectTimetable.vue b/aleksis/apps/chronos/frontend/components/SelectTimetable.vue
index 069d74c56942509bae47aaac844cdf5d2205d383..fb98d1f56c51d4261502df5d8ec2889e39e6445c 100644
--- a/aleksis/apps/chronos/frontend/components/SelectTimetable.vue
+++ b/aleksis/apps/chronos/frontend/components/SelectTimetable.vue
@@ -5,8 +5,9 @@ export default {
   name: "SelectTimetable",
   props: {
     value: {
-      type: String | null,
-      required: true,
+      type: String,
+      required: false,
+      default: null,
     },
     availableTimetables: {
       type: Array,
diff --git a/aleksis/apps/chronos/frontend/components/Timetable.vue b/aleksis/apps/chronos/frontend/components/Timetable.vue
index d685684be91e9e63b7c1e2dc0e991ee7b098b7cf..c572fa34b00c34f61a0915a1f4121c603e6d8ff3 100644
--- a/aleksis/apps/chronos/frontend/components/Timetable.vue
+++ b/aleksis/apps/chronos/frontend/components/Timetable.vue
@@ -115,7 +115,7 @@ export default {
           <select-timetable
             v-model="selected"
             @input="selectDialog = false"
-            :availableTimetables="availableTimetables"
+            :available-timetables="availableTimetables"
           />
         </v-card>
       </v-dialog>
@@ -124,7 +124,7 @@ export default {
         <v-card>
           <select-timetable
             v-model="selected"
-            :availableTimetables="availableTimetables"
+            :available-timetables="availableTimetables"
           />
         </v-card>
       </v-col>