diff --git a/frontend/src/components/group/GroupCreateBox.tsx b/frontend/src/components/group/GroupCreateBox.tsx
index ea501cc..40a9cf5 100644
--- a/frontend/src/components/group/GroupCreateBox.tsx
+++ b/frontend/src/components/group/GroupCreateBox.tsx
@@ -93,7 +93,7 @@ export function GroupCreateBox({viewSet, resource}: GroupCreateBoxProps): JSX.El
                 return obj
             }).reduce((a, b) => {
                 return {...a, ...b}
-            }),
+            }, {}),
             [authorization, cache],
         )
 
diff --git a/frontend/src/contexts/cache.tsx b/frontend/src/contexts/cache.tsx
index 58749cd..ffbb27d 100644
--- a/frontend/src/contexts/cache.tsx
+++ b/frontend/src/contexts/cache.tsx
@@ -45,7 +45,7 @@ export function CacheProvider({children}: WithChildren): JSX.Element {
                     return obj
                 }).reduce((a, b) => {
                     return {...a, ...b}
-                })
+                }, {})
             },
             [users],
         )