diff --git a/src/api/group.ts b/src/api/group.ts
index e35b6db..eec5675 100644
--- a/src/api/group.ts
+++ b/src/api/group.ts
@@ -63,7 +63,7 @@ export const getGroups = async (groupsReq: groupsReq): Promise<groupsRes> => {
   }
 }
 
-export const getGroup = async (id: number): Promise<group> => {
+export const getGroup = async (id: number | undefined): Promise<group> => {
   try {
     const res = await axiosInstance.get(`/groups/${id}`)
     return res.data.data
diff --git a/src/components/Crew/CrewList.tsx b/src/components/Crew/CrewList.tsx
index 80801b8..7471844 100644
--- a/src/components/Crew/CrewList.tsx
+++ b/src/components/Crew/CrewList.tsx
@@ -60,7 +60,7 @@ const CrewList = (): ReactElement => {
   }
 
   const createSortList = (): JSX.Element[] => {
-    return SORT_LIST.map((s, i) => (
+    return SORT_LIST.map((s) => (
       // eslint-disable-next-line max-len
       <div
         key={`sort-list-${s.sort}`}
diff --git a/src/hooks/useGroupMutation.ts b/src/hooks/useGroupMutation.ts
index 239eb1e..f5125d9 100644
--- a/src/hooks/useGroupMutation.ts
+++ b/src/hooks/useGroupMutation.ts
@@ -16,7 +16,7 @@ export const useGetGroups = (params: groupsReq): UseQueryResult<groupsRes, Error
   return useQuery<groupsRes, Error>({ queryKey: ["groups", params], queryFn: () => getGroups(params) })
 }
 
-export const useGetGroup = (id: number): UseQueryResult<group, Error> => {
+export const useGetGroup = (id: number | undefined): UseQueryResult<group, Error> => {
   // eslint-disable-next-line max-len
   return useQuery<group, Error>({ queryKey: ["group", id], queryFn: () => getGroup(id) })
 }