diff --git a/frontend/src/components/EventAdmin.tsx b/frontend/src/components/EventAdmin.tsx
index a7e14de..249e1e5 100644
--- a/frontend/src/components/EventAdmin.tsx
+++ b/frontend/src/components/EventAdmin.tsx
@@ -772,7 +772,7 @@ const EventAdmin: React.FC = () => {
                         .map(r => r.other_items)
                         .filter(Boolean)
                         .flat()
-                        .filter((item: string) => item && item.trim() !== '');
+                        .filter((item): item is string => typeof item === 'string' && item.trim() !== '');
                       return allOtherItems.length > 0
                         ? allOtherItems.join(', ')
                         : 'No other items have been brought';
diff --git a/frontend/src/components/EventView.tsx b/frontend/src/components/EventView.tsx
index 204b714..a607768 100644
--- a/frontend/src/components/EventView.tsx
+++ b/frontend/src/components/EventView.tsx
@@ -249,7 +249,7 @@ const EventView: React.FC = () => {
                         .map(r => r.other_items)
                         .filter(Boolean)
                         .flat()
-                        .filter((item: string) => item && item.trim() !== '');
+                        .filter((item): item is string => typeof item === 'string' && item.trim() !== '');
                       return allOtherItems.length > 0
                         ? allOtherItems.join(', ')
                         : 'No other items have been brought';