diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt
index 401caf68a..419160d6d 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt
@@ -318,10 +318,10 @@ class MainActivity : SimpleActivity(), NavigationListener {
 
     private fun refreshViewPager() {
         when {
-            config.storedView == YEARLY_VIEW -> (main_view_pager.adapter as MyYearPagerAdapter).refreshEvents(main_view_pager.currentItem)
+            config.storedView == YEARLY_VIEW -> (main_view_pager.adapter as? MyYearPagerAdapter)?.refreshEvents(main_view_pager.currentItem)
             config.storedView == EVENTS_LIST_VIEW -> fillEventsList()
-            config.storedView == WEEKLY_VIEW -> (week_view_view_pager.adapter as MyWeekPagerAdapter).refreshEvents(week_view_view_pager.currentItem)
-            else -> (main_view_pager.adapter as MyMonthPagerAdapter).refreshEvents(main_view_pager.currentItem)
+            config.storedView == WEEKLY_VIEW -> (week_view_view_pager.adapter as? MyWeekPagerAdapter)?.refreshEvents(week_view_view_pager.currentItem)
+            else -> (main_view_pager.adapter as? MyMonthPagerAdapter)?.refreshEvents(main_view_pager.currentItem)
         }
     }