diff --git a/src/components/common/AlertComponent.vue b/src/components/common/AlertComponent.vue
index 40a5c8d..c6a9f47 100644
--- a/src/components/common/AlertComponent.vue
+++ b/src/components/common/AlertComponent.vue
@@ -69,7 +69,7 @@ const alertIcons = {
   info: Info
 }
 
-let intervalId: number
+let intervalId: ReturnType<typeof setInterval>
 
 onMounted(() => {
   intervalId = setInterval(() => {
diff --git a/src/utils/common.ts b/src/utils/common.ts
index 9abd920..cd5c150 100644
--- a/src/utils/common.ts
+++ b/src/utils/common.ts
@@ -114,7 +114,7 @@ export function debounce<T extends (...args: unknown[]) => unknown>(
   func: T,
   wait: number
 ): (...args: Parameters<T>) => void {
-  let timeout: number | null = null
+  let timeout: ReturnType<typeof setTimeout> | null = null
   
   return (...args: Parameters<T>) => {
     if (timeout) {