diff --git a/types/react-big-calendar/index.d.ts b/types/react-big-calendar/index.d.ts
index cb3325a0c8..45895a1f83 100644
--- a/types/react-big-calendar/index.d.ts
+++ b/types/react-big-calendar/index.d.ts
@@ -8,6 +8,7 @@
 //                 janb87 <https://github.com/janb87>
 //                 Daniel Thorne <https://github.com/ldthorne>
 //                 Panagiotis Rikarnto Siavelis <https://github.com/siavelis>
+//                 Tomas Hubelbauer <https://github.com/TomasHubelbauer>
 //                 Lucas Silva Souza <https://github.com/lksilva>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
@@ -252,7 +253,7 @@ export interface BigCalendarProps<TEvent extends Event = Event, TResource extend
     onDoubleClickEvent?: (event: TEvent, e: React.SyntheticEvent<HTMLElement>) => void;
     onSelectEvent?: (event: TEvent, e: React.SyntheticEvent<HTMLElement>) => void;
     onSelecting?: (range: { start: stringOrDate, end: stringOrDate }) => boolean | undefined | null;
-    onRangeChange?: (range: { start: stringOrDate, end: stringOrDate }) => void;
+    onRangeChange?: (range: Array<Date | { start: stringOrDate, end: stringOrDate }>) => void;
     selected?: any;
     views?: Views;
     drilldownView?: View | null;