diff --git a/core.go b/core.go
index 07c08f3..b383e6d 100644
--- a/core.go
+++ b/core.go
@@ -376,7 +376,7 @@ func jsonEncode(v interface{}) string {
 
 var GetHolidaysData func() ([]HolidaysItem, error)
 
-var holidayCache *cache
+var holidayCache cache
 var holidayCacheLock sync.Mutex
 
 func GetHolidaysDataWithCache() ([]HolidaysItem, error) {