diff --git a/Sources/JTAppleCalendarView.swift b/Sources/JTAppleCalendarView.swift
index 32e0aa17..b10e1def 100644
--- a/Sources/JTAppleCalendarView.swift
+++ b/Sources/JTAppleCalendarView.swift
@@ -116,7 +116,8 @@ open class JTAppleCalendarView: UICollectionView {
         if (collectionViewLayout as! JTAppleCalendarLayout).lastSetCollectionViewSize != frame {
             // ive seen that layout subview gets called. Calendar is setup, and then it gets called again
             // At this point, it already has generaed cells which needs to be invalidated.
-            reloadData()
+            calendarViewLayout.invalidateLayout()
+            layoutIfNeeded()
         }
         
         if !delayedExecutionClosure.isEmpty, isCalendarLayoutLoaded {