diff --git a/client/src/components/content-blocks/assignment/Assignment.vue b/client/src/components/content-blocks/assignment/Assignment.vue
index f68a3dac..18e88051 100644
--- a/client/src/components/content-blocks/assignment/Assignment.vue
+++ b/client/src/components/content-blocks/assignment/Assignment.vue
@@ -85,7 +85,9 @@ const SpellCheck = defineAsyncComponent(() => import('@/components/content-block
 const route = useRoute();
 const assignmentDiv = ref<HTMLElement | null>(null);
 
-const props = defineProps<Props>();
+const props = withDefaults(defineProps<Props>(), {
+  highlights: () => [],
+});
 
 const initialSubmission = {
   text: '',