diff --git a/src/lib/userstore.ts b/src/lib/userstore.ts
index a64a5e8..07c4752 100644
--- a/src/lib/userstore.ts
+++ b/src/lib/userstore.ts
@@ -5,7 +5,7 @@ type UserState = {
     access_token: string;
     refresh_token: string;
     isLoggedIn: boolean;
-    refreshInterval: number
+    refreshInterval: NodeJS.Timer | undefined
 };
 
 const userStore = () => {
@@ -13,7 +13,7 @@ const userStore = () => {
         access_token: '',
         refresh_token: '',
         isLoggedIn: false,
-        refreshInterval: 0
+        refreshInterval: undefined
     };
 
     const { subscribe, set, update } = writable(state);
@@ -75,7 +75,7 @@ const userStore = () => {
                 state.isLoggedIn = false;
                 state.access_token = '';
                 state.refresh_token = '';
-                state.refreshInterval = 0;
+                state.refreshInterval = undefined;
                 localStorage.clear();
                 return state;
             });