diff --git a/server/src/utils/access.ts b/server/src/utils/access.ts
index 0b2edd2..0baa4a0 100644
--- a/server/src/utils/access.ts
+++ b/server/src/utils/access.ts
@@ -29,7 +29,7 @@ export function encrypt(
     building_id: number,
     type: typeof SELF_ACCESS_CODE | typeof VISTOR_ACCESS_CODE
 ): string {
-    return crypto.encrypt(`${id}#${building_id}#${type}${Date.now()}`);
+    return crypto.encrypt(`${id}#${building_id}#${type}#${Date.now()}`);
 }
 
 export function decrypt(uid: string): DecryptResult {